fix_id int64 849 54.8k | code_id int64 213 15.4k | fix_title large_stringlengths 21 90 | probability_rank int64 1 4 | difficulty_level large_stringclasses 3
values | est_parts_cost_min_usd float64 1 1.2k | est_parts_cost_max_usd float64 5 3.2k | est_labor_hours float64 0.2 4.5 | step_by_step_instructions large_stringlengths 163 644 | __index_level_0__ int64 848 54.8k |
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849 | 213 | Inspect wheel speed sensor connector and harness routing | 1 | Easy DIY | 5 | 25 | 0.4 | Locate the sensor connector near the hub or knuckle at the affected corner • Unplug and inspect for corrosion, moisture, or a bent pin • Follow the harness up to the body grommet checking for chafing against the strut or subframe • Clean, reseat, clear the code, and road test | 848 |
850 | 213 | Test wheel speed sensor resistance and signal | 2 | Moderate DIY | 10 | 40 | 0.6 | Unplug the sensor and measure coil resistance against the factory specification • Reconnect and back-probe the signal circuit while rotating the wheel by hand • Confirm a clean, consistent AC signal with no dropouts • Replace the sensor if resistance is out of range or the signal is erratic | 849 |
851 | 213 | Replace wheel speed sensor | 3 | Moderate DIY | 30 | 120 | 0.6 | Disconnect the battery negative terminal • Remove the sensor mounting bolt and pull the sensor from the knuckle • Install the replacement sensor, confirming it seats fully against the tone ring • Clear the code and confirm signal quality across a range of speeds | 850 |
852 | 213 | Repair chafed wheel speed sensor harness wiring | 4 | Professional Required | 15 | 65 | 1.2 | Trace the harness from the sensor to the body connector along the strut and control arm • Identify the chafe point, commonly where the harness crosses suspension travel • Repair damaged conductors with solder and heat-shrink, then re-route and secure the harness • Clear codes and confirm all four corners correlate corr... | 851 |
865 | 217 | Inspect wheel speed sensor connector and harness routing | 1 | Easy DIY | 5 | 25 | 0.4 | Locate the sensor connector near the hub or knuckle at the affected corner • Unplug and inspect for corrosion, moisture, or a bent pin • Follow the harness up to the body grommet checking for chafing against the strut or subframe • Clean, reseat, clear the code, and road test | 864 |
866 | 217 | Test wheel speed sensor resistance and signal | 2 | Moderate DIY | 10 | 40 | 0.6 | Unplug the sensor and measure coil resistance against the factory specification • Reconnect and back-probe the signal circuit while rotating the wheel by hand • Confirm a clean, consistent AC signal with no dropouts • Replace the sensor if resistance is out of range or the signal is erratic | 865 |
867 | 217 | Replace wheel speed sensor | 3 | Moderate DIY | 30 | 120 | 0.6 | Disconnect the battery negative terminal • Remove the sensor mounting bolt and pull the sensor from the knuckle • Install the replacement sensor, confirming it seats fully against the tone ring • Clear the code and confirm signal quality across a range of speeds | 866 |
868 | 217 | Repair chafed wheel speed sensor harness wiring | 4 | Professional Required | 15 | 65 | 1.2 | Trace the harness from the sensor to the body connector along the strut and control arm • Identify the chafe point, commonly where the harness crosses suspension travel • Repair damaged conductors with solder and heat-shrink, then re-route and secure the harness • Clear codes and confirm all four corners correlate corr... | 867 |
909 | 228 | Adjust brake pedal switch plunger clearance | 1 | Easy DIY | 3 | 15 | 0.3 | Locate the brake pedal switch mounted on the pedal bracket above the pedal arm • Loosen the switch locknut and adjust plunger contact per the service manual clearance spec • Pull the pedal fully rearward to auto-adjust the switch on platforms that support it • Verify stop lamps and scan tool brake switch PID respond co... | 908 |
910 | 228 | Inspect brake pedal switch connector | 2 | Easy DIY | 5 | 20 | 0.3 | Unplug the switch connector and inspect pins for corrosion • Clean with electrical contact cleaner and reseat the connector • Confirm both switch channels toggle together with a multimeter • Clear the code and verify stop lamp operation | 909 |
911 | 228 | Replace brake pedal switch | 3 | Moderate DIY | 15 | 60 | 0.5 | Disconnect the battery negative terminal • Rotate and remove the switch from the pedal bracket • Install the replacement switch and adjust plunger clearance to spec • Clear codes and confirm correct stop lamp and brake-applied signal operation | 910 |
912 | 228 | Repair stop lamp/brake switch circuit wiring | 4 | Professional Required | 15 | 60 | 1 | Trace the harness from the switch to the module and stop lamp fuse • Check for chafing near the pedal bracket and steering column • Repair with solder and heat-shrink where damaged • Verify both switch channels and stop lamps function correctly | 911 |
2,710 | 684 | Change engine oil and filter to spec viscosity | 1 | Easy DIY | 25 | 60 | 0.5 | 1. Drain and inspect oil condition for sludge or debris • 2. Replace with OEM-viscosity oil and a new filter • 3. Clear codes and run a phaser sweep test with a scan tool • 4. Road test through varied load to confirm stable timing | 2,709 |
2,711 | 684 | Replace oil control valve and clean phaser feed passage | 2 | Moderate DIY | 35 | 160 | 1.3 | 1. Remove the OCV solenoid and inspect its filter screen • 2. Clean the oil feed passage to the phaser of sludge with solvent and compressed air • 3. Install a new OCV solenoid • 4. Clear adaptive learning and verify timing response | 2,710 |
2,712 | 684 | Replace worn camshaft phaser assembly | 3 | Professional Required | 180 | 550 | 2.8 | 1. Set the engine to TDC and lock the timing chain • 2. Remove the worn phaser and inspect the chain/tensioner for related wear • 3. Install the new phaser and retime to factory marks • 4. Verify actuator sweep and clear codes | 2,711 |
2,713 | 684 | Correct timing chain/belt installation | 4 | Professional Required | 150 | 900 | 3.5 | 1. Remove the timing cover and verify marks against factory specification • 2. Correct any tooth-count misalignment on the chain or belt • 3. Replace the tensioner and guides while accessed • 4. Confirm cam/crank correlation and phaser response | 2,712 |
2,729 | 689 | Inspect and replace crankshaft/camshaft position sensor | 1 | Moderate DIY | 25 | 90 | 0.8 | 1. Identify which sensor the correlation fault points to on the scan tool freeze frame • 2. Unplug and remove the affected position sensor • 3. Inspect the reluctor wheel/tone ring for chips or debris • 4. Install the new sensor with correct air-gap shim and clear codes | 2,728 |
2,730 | 689 | Inspect timing chain/belt for stretch or jumped timing | 2 | Professional Required | 150 | 900 | 3.5 | 1. Remove the timing cover and verify cam-to-crank alignment against factory timing marks • 2. Measure chain stretch or check belt tooth wear • 3. Replace the timing chain/belt, tensioner, and guides as a set • 4. Reset timing to factory marks and verify correlation with a scan tool | 2,729 |
2,731 | 689 | Repair crank/cam sensor wiring and connectors | 3 | Professional Required | 10 | 60 | 1.2 | 1. Back-probe the sensor signal and ground at each connector while cranking • 2. Voltage-drop test the harness runs back to the ECM • 3. Repair chafed conductors near the timing cover with heat-shrink splices • 4. Confirm clean square-wave signals on a scope | 2,730 |
3,481 | 924 | Clean MAF sensing element and inspect intake ducting | 1 | Easy DIY | 8 | 20 | 0.3 | 1. Remove the intake duct clamp and unplug the MAF connector • 2. Remove the sensor with a security Torx bit • 3. Spray the hot-wire element with dedicated MAF cleaner (never touch it) • 4. Inspect the duct for cracks or loose clamps downstream of the sensor • 5. Reinstall, clear the code, and road test | 3,480 |
3,482 | 924 | Replace mass air flow sensor | 2 | Moderate DIY | 45 | 220 | 0.5 | 1. Disconnect the battery negative terminal • 2. Unplug the MAF harness connector and remove the sensor screws • 3. Install the replacement sensor without touching the element • 4. Reconnect and perform an ECU idle relearn if the platform requires it | 3,481 |
3,483 | 924 | Repair intake air leak downstream of MAF | 3 | Moderate DIY | 10 | 60 | 1 | 1. Smoke-test or spray-test the intake tract between the MAF and throttle body • 2. Replace cracked intake boots and hardened couplers • 3. Torque all clamps and verify fuel trims return toward 0% at idle | 3,482 |
3,484 | 924 | Diagnose and repair MAF circuit wiring | 4 | Professional Required | 5 | 40 | 1.5 | 1. Back-probe the 5V reference, signal, and ground at the MAF connector • 2. Perform a voltage-drop test on each leg back to the ECM • 3. Repair chafed conductors with solder and heat-shrink • 4. Confirm live airflow (g/s) tracks RPM on a scan tool | 3,483 |
3,485 | 925 | Clean MAF sensing element and inspect intake ducting | 1 | Easy DIY | 8 | 20 | 0.3 | 1. Remove the intake duct clamp and unplug the MAF connector • 2. Remove the sensor with a security Torx bit • 3. Spray the hot-wire element with dedicated MAF cleaner (never touch it) • 4. Inspect the duct for cracks or loose clamps downstream of the sensor • 5. Reinstall, clear the code, and road test | 3,484 |
3,486 | 925 | Replace mass air flow sensor | 2 | Moderate DIY | 45 | 220 | 0.5 | 1. Disconnect the battery negative terminal • 2. Unplug the MAF harness connector and remove the sensor screws • 3. Install the replacement sensor without touching the element • 4. Reconnect and perform an ECU idle relearn if the platform requires it | 3,485 |
3,487 | 925 | Repair intake air leak downstream of MAF | 3 | Moderate DIY | 10 | 60 | 1 | 1. Smoke-test or spray-test the intake tract between the MAF and throttle body • 2. Replace cracked intake boots and hardened couplers • 3. Torque all clamps and verify fuel trims return toward 0% at idle | 3,486 |
3,488 | 925 | Diagnose and repair MAF circuit wiring | 4 | Professional Required | 5 | 40 | 1.5 | 1. Back-probe the 5V reference, signal, and ground at the MAF connector • 2. Perform a voltage-drop test on each leg back to the ECM • 3. Repair chafed conductors with solder and heat-shrink • 4. Confirm live airflow (g/s) tracks RPM on a scan tool | 3,487 |
3,500 | 929 | Inspect and clean MAP sensor vacuum port | 1 | Easy DIY | 5 | 20 | 0.5 | 1. Locate the MAP sensor on the intake manifold • 2. Remove and inspect the vacuum port for oil or debris • 3. Clean the port and sensor housing • 4. Reinstall and clear codes | 3,499 |
3,501 | 929 | Replace MAP/barometric pressure sensor | 2 | Easy DIY | 20 | 90 | 0.4 | 1. Unplug the sensor connector • 2. Remove the sensor from the manifold or its remote mount • 3. Install the replacement sensor with a new O-ring • 4. Clear codes and verify reading against known altitude/barometric baseline | 3,500 |
3,502 | 929 | Repair MAP sensor circuit wiring | 3 | Professional Required | 10 | 60 | 1.2 | 1. Back-probe the 5V reference, signal, and ground at the connector • 2. Voltage-drop test each leg back to the ECM • 3. Repair chafed or corroded conductors with heat-shrink splices • 4. Confirm signal tracks vacuum/boost changes smoothly | 3,501 |
3,545 | 942 | Inspect and clean IAT sensor connector | 1 | Easy DIY | 5 | 15 | 0.4 | 1. Locate the IAT sensor in the intake tube or integrated into the MAF housing • 2. Unplug and inspect for corrosion or debris • 3. Clean contacts and apply dielectric grease • 4. Reconnect and clear codes | 3,544 |
3,546 | 942 | Replace intake air temperature sensor | 2 | Easy DIY | 10 | 50 | 0.4 | 1. Locate the affected IAT sensor per the bank/position in the code • 2. Disconnect and remove the sensor from its bore • 3. Install the replacement sensor with a new seal • 4. Clear codes and verify reading tracks ambient at cold start | 3,545 |
3,547 | 942 | Repair IAT sensor circuit wiring | 3 | Professional Required | 10 | 55 | 1.1 | 1. Measure sensor resistance at the connector against a temperature/resistance chart • 2. Voltage-drop test the circuit back to the ECM • 3. Repair chafed or corroded wiring near the intake tract with heat-shrink splices • 4. Confirm stable readings across temperature swings | 3,546 |
3,548 | 943 | Inspect and clean IAT sensor connector | 1 | Easy DIY | 5 | 15 | 0.4 | 1. Locate the IAT sensor in the intake tube or integrated into the MAF housing • 2. Unplug and inspect for corrosion or debris • 3. Clean contacts and apply dielectric grease • 4. Reconnect and clear codes | 3,547 |
3,549 | 943 | Replace intake air temperature sensor | 2 | Easy DIY | 10 | 50 | 0.4 | 1. Locate the affected IAT sensor per the bank/position in the code • 2. Disconnect and remove the sensor from its bore • 3. Install the replacement sensor with a new seal • 4. Clear codes and verify reading tracks ambient at cold start | 3,548 |
3,550 | 943 | Repair IAT sensor circuit wiring | 3 | Professional Required | 10 | 55 | 1.1 | 1. Measure sensor resistance at the connector against a temperature/resistance chart • 2. Voltage-drop test the circuit back to the ECM • 3. Repair chafed or corroded wiring near the intake tract with heat-shrink splices • 4. Confirm stable readings across temperature swings | 3,549 |
3,560 | 947 | Top off coolant and inspect ECT sensor connector | 1 | Easy DIY | 10 | 30 | 0.4 | 1. Check coolant level and top off with the correct spec coolant • 2. Unplug the ECT sensor connector and inspect for corrosion • 3. Clean contacts and reconnect • 4. Clear codes and monitor warm-up temperature curve | 3,559 |
3,561 | 947 | Replace engine/radiator coolant temperature sensor | 2 | Moderate DIY | 15 | 70 | 0.6 | 1. Relieve cooling system pressure and drain coolant to below sensor level • 2. Remove the sensor from the head, housing, or radiator tank • 3. Install the replacement sensor with sealant or new seal as specified • 4. Refill coolant, bleed air, and clear codes | 3,560 |
3,562 | 947 | Repair coolant temperature sensor wiring | 3 | Professional Required | 10 | 60 | 1.2 | 1. Measure sensor resistance at the connector against a temperature/resistance chart • 2. Voltage-drop test the circuit back to the ECM • 3. Repair chafed or corroded wiring with heat-shrink splices • 4. Confirm reading tracks actual coolant temperature | 3,561 |
3,587 | 956 | Inspect and clean throttle/pedal position sensor connector | 1 | Easy DIY | 5 | 20 | 0.4 | 1. Locate the throttle body or accelerator pedal assembly connector • 2. Unplug and inspect for corrosion or bent pins • 3. Clean contacts and reseat firmly • 4. Clear codes and verify smooth voltage sweep | 3,586 |
3,588 | 956 | Replace throttle body or pedal position sensor assembly | 2 | Moderate DIY | 60 | 280 | 0.8 | 1. Unplug the connector and remove the mounting fasteners • 2. Install the replacement throttle body or pedal assembly • 3. Reconnect and perform a throttle relearn if required • 4. Clear codes and verify all channels track together | 3,587 |
3,589 | 956 | Repair throttle/pedal position sensor wiring | 3 | Professional Required | 10 | 60 | 1.3 | 1. Back-probe the reference, signal, and ground circuits at the connector • 2. Voltage-drop test each leg back to the ECM • 3. Repair chafed conductors with heat-shrink splices • 4. Confirm all sensor channels agree throughout the pedal/throttle sweep | 3,588 |
3,608 | 963 | Check coolant level and inspect for external leaks | 1 | Easy DIY | 10 | 40 | 0.5 | 1. Check coolant level cold and top off to spec • 2. Inspect hoses, radiator, and water pump weep hole for leaks • 3. Repair any obvious external leak source • 4. Clear codes and monitor warm-up time | 3,607 |
3,609 | 963 | Replace stuck-open thermostat | 2 | Moderate DIY | 20 | 90 | 1 | 1. Drain coolant below the thermostat housing • 2. Remove the housing and replace the thermostat and gasket • 3. Refill coolant and bleed air from the system • 4. Confirm engine reaches operating temperature within expected time | 3,608 |
3,610 | 963 | Replace failing water pump | 3 | Professional Required | 120 | 450 | 2 | 1. Drain coolant and remove drive components to access the water pump • 2. Remove the worn pump and inspect the impeller and bearing • 3. Install the replacement pump with a new gasket • 4. Refill, bleed, and verify stable circulation and temperature | 3,609 |
3,635 | 972 | Inspect for exhaust leaks near the O2 sensor | 1 | Easy DIY | 5 | 40 | 0.6 | 1. Inspect the exhaust manifold and pipe joints near the sensor bung for leaks • 2. Listen and smoke-test for exhaust leaks upstream of the sensor • 3. Replace gaskets or tighten fasteners as needed • 4. Clear codes and monitor sensor voltage trace | 3,634 |
3,636 | 972 | Replace oxygen sensor | 2 | Moderate DIY | 50 | 180 | 0.6 | 1. Identify the affected bank/sensor position • 2. Remove the sensor with an O2 sensor socket • 3. Apply anti-seize to threads (avoid the tip) and install the new sensor • 4. Clear codes and confirm a normal switching voltage trace | 3,635 |
3,637 | 972 | Repair O2 sensor signal circuit wiring | 3 | Professional Required | 10 | 60 | 1.2 | 1. Back-probe the signal and ground at the connector with the engine running • 2. Voltage-drop test the circuit back to the ECM • 3. Repair chafed or corroded wiring near the exhaust with high-temp splices • 4. Confirm proper switching activity | 3,636 |
3,641 | 974 | Inspect for contamination sources (oil, coolant, silicone) reaching the exhaust | 1 | Easy DIY | 5 | 60 | 0.8 | 1. Check for oil consumption, coolant leaks, or recent use of silicone sealant near the intake/exhaust • 2. Repair the contamination source if found • 3. Inspect the sensor tip for a sooty or white/gray glassy coating • 4. Clear codes after addressing the source | 3,640 |
3,642 | 974 | Replace slow-responding oxygen sensor | 2 | Moderate DIY | 50 | 180 | 0.6 | 1. Identify the affected bank/sensor position • 2. Remove with an O2 sensor socket and inspect the old sensor tip for contamination • 3. Apply anti-seize and install the new sensor • 4. Clear codes and verify switching frequency improves | 3,641 |
3,643 | 974 | Repair exhaust leak diluting sensor sample | 3 | Moderate DIY | 20 | 120 | 1.2 | 1. Smoke-test the exhaust system upstream of the affected sensor • 2. Replace leaking gaskets or cracked pipe sections • 3. Torque fasteners to spec • 4. Clear codes and re-verify switching speed | 3,642 |
3,647 | 976 | Test O2 sensor heater circuit fuse and relay | 1 | Easy DIY | 5 | 25 | 0.4 | 1. Locate the O2 heater fuse and relay in the underhood fuse box • 2. Inspect and test with a multimeter for continuity and proper switching • 3. Replace any blown fuse or failed relay • 4. Clear codes and verify heater current draw | 3,646 |
3,648 | 976 | Replace oxygen sensor with failed heater | 2 | Moderate DIY | 50 | 180 | 0.6 | 1. Identify the affected bank/sensor position from the code • 2. Unplug the connector and remove the sensor with an O2 sensor socket • 3. Apply anti-seize to threads (avoid the sensor tip) and install the new sensor • 4. Reconnect and clear codes | 3,647 |
3,649 | 976 | Repair O2 heater circuit wiring | 3 | Professional Required | 10 | 60 | 1.2 | 1. Measure heater element resistance at the connector against spec • 2. Voltage-drop test the heater supply and ground legs • 3. Repair chafed or corroded wiring near the exhaust manifold with high-temp splices • 4. Confirm heater current draw matches spec | 3,648 |
3,656 | 979 | Inspect for exhaust leaks near the O2 sensor | 1 | Easy DIY | 5 | 40 | 0.6 | 1. Inspect the exhaust manifold and pipe joints near the sensor bung for leaks • 2. Listen and smoke-test for exhaust leaks upstream of the sensor • 3. Replace gaskets or tighten fasteners as needed • 4. Clear codes and monitor sensor voltage trace | 3,655 |
3,657 | 979 | Replace oxygen sensor | 2 | Moderate DIY | 50 | 180 | 0.6 | 1. Identify the affected bank/sensor position • 2. Remove the sensor with an O2 sensor socket • 3. Apply anti-seize to threads (avoid the tip) and install the new sensor • 4. Clear codes and confirm a normal switching voltage trace | 3,656 |
3,658 | 979 | Repair O2 sensor signal circuit wiring | 3 | Professional Required | 10 | 60 | 1.2 | 1. Back-probe the signal and ground at the connector with the engine running • 2. Voltage-drop test the circuit back to the ECM • 3. Repair chafed or corroded wiring near the exhaust with high-temp splices • 4. Confirm proper switching activity | 3,657 |
3,683 | 988 | Test O2 sensor heater circuit fuse and relay | 1 | Easy DIY | 5 | 25 | 0.4 | 1. Locate the O2 heater fuse and relay in the underhood fuse box • 2. Inspect and test with a multimeter for continuity and proper switching • 3. Replace any blown fuse or failed relay • 4. Clear codes and verify heater current draw | 3,682 |
3,684 | 988 | Replace oxygen sensor with failed heater | 2 | Moderate DIY | 50 | 180 | 0.6 | 1. Identify the affected bank/sensor position from the code • 2. Unplug the connector and remove the sensor with an O2 sensor socket • 3. Apply anti-seize to threads (avoid the sensor tip) and install the new sensor • 4. Reconnect and clear codes | 3,683 |
3,685 | 988 | Repair O2 heater circuit wiring | 3 | Professional Required | 10 | 60 | 1.2 | 1. Measure heater element resistance at the connector against spec • 2. Voltage-drop test the heater supply and ground legs • 3. Repair chafed or corroded wiring near the exhaust manifold with high-temp splices • 4. Confirm heater current draw matches spec | 3,684 |
3,827 | 1,036 | Smoke-test intake for vacuum/air leaks | 1 | Easy DIY | 10 | 40 | 0.8 | 1. Connect a smoke machine to the intake at idle • 2. Watch for smoke escaping at intake gaskets, PCV hoses, or brake booster line • 3. Replace any leaking gasket or hose • 4. Clear codes and verify fuel trims return toward 0% | 3,826 |
3,828 | 1,036 | Replace fuel filter and test fuel pump output | 2 | Moderate DIY | 30 | 150 | 1 | 1. Replace the fuel filter if serviceable • 2. Measure fuel pump pressure and volume against spec under load • 3. Replace a weak pump if it fails the test • 4. Clear codes and confirm rail pressure holds steady | 3,827 |
3,829 | 1,036 | Inspect and repair exhaust manifold gasket leak | 3 | Moderate DIY | 40 | 180 | 1.5 | 1. Inspect the exhaust manifold gasket and studs near the upstream O2 sensor for leaks • 2. Replace the gasket and any corroded studs • 3. Torque to spec in sequence • 4. Clear codes and re-verify trim correction | 3,828 |
3,830 | 1,037 | Clean MAF sensor and inspect for false-high airflow readings | 1 | Easy DIY | 8 | 25 | 0.4 | 1. Remove the MAF sensor and inspect the hot-wire element for contamination • 2. Clean with dedicated MAF cleaner (never touch the element) • 3. Reinstall and clear codes • 4. Compare live MAF g/s reading against expected values | 3,829 |
3,831 | 1,037 | Test fuel injectors for leakage and replace as needed | 2 | Moderate DIY | 40 | 220 | 1.5 | 1. Perform a fuel injector leak-down/drip test • 2. Identify any injector leaking past its seat • 3. Replace the faulty injector(s) and seals • 4. Clear codes and verify trims return toward 0% | 3,830 |
3,832 | 1,037 | Replace stuck-open fuel pressure regulator | 3 | Moderate DIY | 40 | 180 | 1 | 1. Depressurize the fuel system • 2. Remove the regulator and inspect the diaphragm/valve for sticking • 3. Install the replacement regulator with new seals • 4. Clear codes and confirm rail pressure holds at commanded target | 3,831 |
3,836 | 1,039 | Smoke-test intake for vacuum/air leaks | 1 | Easy DIY | 10 | 40 | 0.8 | 1. Connect a smoke machine to the intake at idle • 2. Watch for smoke escaping at intake gaskets, PCV hoses, or brake booster line • 3. Replace any leaking gasket or hose • 4. Clear codes and verify fuel trims return toward 0% | 3,835 |
3,837 | 1,039 | Replace fuel filter and test fuel pump output | 2 | Moderate DIY | 30 | 150 | 1 | 1. Replace the fuel filter if serviceable • 2. Measure fuel pump pressure and volume against spec under load • 3. Replace a weak pump if it fails the test • 4. Clear codes and confirm rail pressure holds steady | 3,836 |
3,838 | 1,039 | Inspect and repair exhaust manifold gasket leak | 3 | Moderate DIY | 40 | 180 | 1.5 | 1. Inspect the exhaust manifold gasket and studs near the upstream O2 sensor for leaks • 2. Replace the gasket and any corroded studs • 3. Torque to spec in sequence • 4. Clear codes and re-verify trim correction | 3,837 |
3,839 | 1,040 | Clean MAF sensor and inspect for false-high airflow readings | 1 | Easy DIY | 8 | 25 | 0.4 | 1. Remove the MAF sensor and inspect the hot-wire element for contamination • 2. Clean with dedicated MAF cleaner (never touch the element) • 3. Reinstall and clear codes • 4. Compare live MAF g/s reading against expected values | 3,838 |
3,840 | 1,040 | Test fuel injectors for leakage and replace as needed | 2 | Moderate DIY | 40 | 220 | 1.5 | 1. Perform a fuel injector leak-down/drip test • 2. Identify any injector leaking past its seat • 3. Replace the faulty injector(s) and seals • 4. Clear codes and verify trims return toward 0% | 3,839 |
3,841 | 1,040 | Replace stuck-open fuel pressure regulator | 3 | Moderate DIY | 40 | 180 | 1 | 1. Depressurize the fuel system • 2. Remove the regulator and inspect the diaphragm/valve for sticking • 3. Install the replacement regulator with new seals • 4. Clear codes and confirm rail pressure holds at commanded target | 3,840 |
5,039 | 1,435 | Replace spark plugs and inspect ignition coils as a set | 1 | Easy DIY | 30 | 90 | 1.2 | 1. Retrieve freeze-frame data to see which cylinders were flagged • 2. Remove and inspect all spark plugs for wear, fouling, or incorrect gap • 3. Replace the full set with OE-spec plugs • 4. Swap coils between cylinders if a weak coil is suspected • 5. Clear codes and monitor misfire counters on a drive cycle | 5,038 |
5,040 | 1,435 | Smoke-test intake and vacuum lines for a shared leak | 2 | Moderate DIY | 15 | 60 | 1 | 1. Connect a smoke machine at the intake tract with all accessory vacuum ports capped • 2. Watch for smoke escaping at intake gaskets, PCV hoses, or brake booster lines • 3. Replace any cracked hose or gasket found • 4. Clear the code and verify fuel trims return to normal | 5,039 |
5,041 | 1,435 | Verify fuel delivery and refuel if the tank is low | 3 | Easy DIY | 5 | 20 | 0.2 | 1. Check the fuel gauge and refuel above one-quarter tank if low • 2. Scan for low fuel pressure or pump duty-cycle codes stored alongside the misfire • 3. Clear the code and complete a drive cycle to confirm it does not return | 5,040 |
5,042 | 1,435 | Test fuel pump output pressure and delivery volume | 4 | Moderate DIY | 20 | 250 | 1.3 | 1. Connect a fuel pressure gauge to the test port or rail • 2. Compare static and key-on pressure to spec • 3. Perform a timed volume test at the return line if accessible • 4. Replace a fuel pump that cannot hold pressure or deliver volume under load | 5,041 |
5,043 | 1,436 | Swap spark plug and ignition coil to confirm the cylinder | 1 | Easy DIY | 15 | 45 | 0.6 | 1. Remove the coil and plug from the misfiring cylinder • 2. Inspect the plug for fouling, wear, or an incorrect gap • 3. Swap the coil with a known-good adjacent cylinder's coil • 4. Clear the code and see if the misfire follows the coil or stays with the cylinder • 5. Replace the plug and/or coil based on the result | 5,042 |
5,044 | 1,436 | Test and clean or replace the cylinder's fuel injector | 2 | Moderate DIY | 40 | 180 | 1 | 1. Perform an injector balance or ohms test on the affected cylinder • 2. Swap the injector with a neighboring cylinder to see if the misfire follows • 3. Clean the injector on an ultrasonic bench or replace it • 4. Reinstall with new O-rings and clear codes | 5,043 |
5,045 | 1,436 | Run a cylinder compression or leak-down test | 3 | Moderate DIY | 20 | 80 | 1.5 | 1. Disable fuel and ignition for a dry compression test on all cylinders • 2. Compare the flagged cylinder's reading against its neighbors • 3. Add oil and retest (wet test) to isolate rings vs. valves • 4. Follow up with a leak-down test to confirm the exact leak path | 5,044 |
5,046 | 1,436 | Inspect and replace a leaking or damaged cylinder head gasket/valve | 4 | Professional Required | 150 | 900 | 4.5 | 1. Confirm the leak-down result points to a head gasket or valve seat • 2. Remove the valve cover/head as required for access • 3. Replace the head gasket or recondition the valve seat • 4. Reassemble to torque spec and verify compression returns to spec | 5,045 |
5,047 | 1,437 | Swap spark plug and ignition coil to confirm the cylinder | 1 | Easy DIY | 15 | 45 | 0.6 | 1. Remove the coil and plug from the misfiring cylinder • 2. Inspect the plug for fouling, wear, or an incorrect gap • 3. Swap the coil with a known-good adjacent cylinder's coil • 4. Clear the code and see if the misfire follows the coil or stays with the cylinder • 5. Replace the plug and/or coil based on the result | 5,046 |
5,048 | 1,437 | Test and clean or replace the cylinder's fuel injector | 2 | Moderate DIY | 40 | 180 | 1 | 1. Perform an injector balance or ohms test on the affected cylinder • 2. Swap the injector with a neighboring cylinder to see if the misfire follows • 3. Clean the injector on an ultrasonic bench or replace it • 4. Reinstall with new O-rings and clear codes | 5,047 |
5,049 | 1,437 | Run a cylinder compression or leak-down test | 3 | Moderate DIY | 20 | 80 | 1.5 | 1. Disable fuel and ignition for a dry compression test on all cylinders • 2. Compare the flagged cylinder's reading against its neighbors • 3. Add oil and retest (wet test) to isolate rings vs. valves • 4. Follow up with a leak-down test to confirm the exact leak path | 5,048 |
5,050 | 1,437 | Inspect and replace a leaking or damaged cylinder head gasket/valve | 4 | Professional Required | 150 | 900 | 4.5 | 1. Confirm the leak-down result points to a head gasket or valve seat • 2. Remove the valve cover/head as required for access • 3. Replace the head gasket or recondition the valve seat • 4. Reassemble to torque spec and verify compression returns to spec | 5,049 |
5,051 | 1,438 | Swap spark plug and ignition coil to confirm the cylinder | 1 | Easy DIY | 15 | 45 | 0.6 | 1. Remove the coil and plug from the misfiring cylinder • 2. Inspect the plug for fouling, wear, or an incorrect gap • 3. Swap the coil with a known-good adjacent cylinder's coil • 4. Clear the code and see if the misfire follows the coil or stays with the cylinder • 5. Replace the plug and/or coil based on the result | 5,050 |
5,052 | 1,438 | Test and clean or replace the cylinder's fuel injector | 2 | Moderate DIY | 40 | 180 | 1 | 1. Perform an injector balance or ohms test on the affected cylinder • 2. Swap the injector with a neighboring cylinder to see if the misfire follows • 3. Clean the injector on an ultrasonic bench or replace it • 4. Reinstall with new O-rings and clear codes | 5,051 |
5,053 | 1,438 | Run a cylinder compression or leak-down test | 3 | Moderate DIY | 20 | 80 | 1.5 | 1. Disable fuel and ignition for a dry compression test on all cylinders • 2. Compare the flagged cylinder's reading against its neighbors • 3. Add oil and retest (wet test) to isolate rings vs. valves • 4. Follow up with a leak-down test to confirm the exact leak path | 5,052 |
5,054 | 1,438 | Inspect and replace a leaking or damaged cylinder head gasket/valve | 4 | Professional Required | 150 | 900 | 4.5 | 1. Confirm the leak-down result points to a head gasket or valve seat • 2. Remove the valve cover/head as required for access • 3. Replace the head gasket or recondition the valve seat • 4. Reassemble to torque spec and verify compression returns to spec | 5,053 |
5,055 | 1,439 | Swap spark plug and ignition coil to confirm the cylinder | 1 | Easy DIY | 15 | 45 | 0.6 | 1. Remove the coil and plug from the misfiring cylinder • 2. Inspect the plug for fouling, wear, or an incorrect gap • 3. Swap the coil with a known-good adjacent cylinder's coil • 4. Clear the code and see if the misfire follows the coil or stays with the cylinder • 5. Replace the plug and/or coil based on the result | 5,054 |
5,056 | 1,439 | Test and clean or replace the cylinder's fuel injector | 2 | Moderate DIY | 40 | 180 | 1 | 1. Perform an injector balance or ohms test on the affected cylinder • 2. Swap the injector with a neighboring cylinder to see if the misfire follows • 3. Clean the injector on an ultrasonic bench or replace it • 4. Reinstall with new O-rings and clear codes | 5,055 |
5,057 | 1,439 | Run a cylinder compression or leak-down test | 3 | Moderate DIY | 20 | 80 | 1.5 | 1. Disable fuel and ignition for a dry compression test on all cylinders • 2. Compare the flagged cylinder's reading against its neighbors • 3. Add oil and retest (wet test) to isolate rings vs. valves • 4. Follow up with a leak-down test to confirm the exact leak path | 5,056 |
5,058 | 1,439 | Inspect and replace a leaking or damaged cylinder head gasket/valve | 4 | Professional Required | 150 | 900 | 4.5 | 1. Confirm the leak-down result points to a head gasket or valve seat • 2. Remove the valve cover/head as required for access • 3. Replace the head gasket or recondition the valve seat • 4. Reassemble to torque spec and verify compression returns to spec | 5,057 |
5,059 | 1,440 | Swap spark plug and ignition coil to confirm the cylinder | 1 | Easy DIY | 15 | 45 | 0.6 | 1. Remove the coil and plug from the misfiring cylinder • 2. Inspect the plug for fouling, wear, or an incorrect gap • 3. Swap the coil with a known-good adjacent cylinder's coil • 4. Clear the code and see if the misfire follows the coil or stays with the cylinder • 5. Replace the plug and/or coil based on the result | 5,058 |
5,060 | 1,440 | Test and clean or replace the cylinder's fuel injector | 2 | Moderate DIY | 40 | 180 | 1 | 1. Perform an injector balance or ohms test on the affected cylinder • 2. Swap the injector with a neighboring cylinder to see if the misfire follows • 3. Clean the injector on an ultrasonic bench or replace it • 4. Reinstall with new O-rings and clear codes | 5,059 |
5,061 | 1,440 | Run a cylinder compression or leak-down test | 3 | Moderate DIY | 20 | 80 | 1.5 | 1. Disable fuel and ignition for a dry compression test on all cylinders • 2. Compare the flagged cylinder's reading against its neighbors • 3. Add oil and retest (wet test) to isolate rings vs. valves • 4. Follow up with a leak-down test to confirm the exact leak path | 5,060 |
5,062 | 1,440 | Inspect and replace a leaking or damaged cylinder head gasket/valve | 4 | Professional Required | 150 | 900 | 4.5 | 1. Confirm the leak-down result points to a head gasket or valve seat • 2. Remove the valve cover/head as required for access • 3. Replace the head gasket or recondition the valve seat • 4. Reassemble to torque spec and verify compression returns to spec | 5,061 |
5,063 | 1,441 | Swap spark plug and ignition coil to confirm the cylinder | 1 | Easy DIY | 15 | 45 | 0.6 | 1. Remove the coil and plug from the misfiring cylinder • 2. Inspect the plug for fouling, wear, or an incorrect gap • 3. Swap the coil with a known-good adjacent cylinder's coil • 4. Clear the code and see if the misfire follows the coil or stays with the cylinder • 5. Replace the plug and/or coil based on the result | 5,062 |
5,064 | 1,441 | Test and clean or replace the cylinder's fuel injector | 2 | Moderate DIY | 40 | 180 | 1 | 1. Perform an injector balance or ohms test on the affected cylinder • 2. Swap the injector with a neighboring cylinder to see if the misfire follows • 3. Clean the injector on an ultrasonic bench or replace it • 4. Reinstall with new O-rings and clear codes | 5,063 |
5,065 | 1,441 | Run a cylinder compression or leak-down test | 3 | Moderate DIY | 20 | 80 | 1.5 | 1. Disable fuel and ignition for a dry compression test on all cylinders • 2. Compare the flagged cylinder's reading against its neighbors • 3. Add oil and retest (wet test) to isolate rings vs. valves • 4. Follow up with a leak-down test to confirm the exact leak path | 5,064 |
5,066 | 1,441 | Inspect and replace a leaking or damaged cylinder head gasket/valve | 4 | Professional Required | 150 | 900 | 4.5 | 1. Confirm the leak-down result points to a head gasket or valve seat • 2. Remove the valve cover/head as required for access • 3. Replace the head gasket or recondition the valve seat • 4. Reassemble to torque spec and verify compression returns to spec | 5,065 |
End of preview. Expand in Data Studio
🔧 MechanicDB — OBD-II Diagnostic & Repair Database (Free Sample)
The free developer sample of MechanicDB: an automotive dataset mapping OBD-II Diagnostic Trouble Codes (DTCs) to ranked repair procedures with DIY difficulty ratings, aftermarket parts-cost ranges (USD), labor-hour estimates, and step-by-step instructions.
90 curated codes (75 SAE-universal + 15 manufacturer-specific across makes like Ford, Toyota, BMW, Audi) in the identical schema as the full commercial dataset — the most-searched codes (P0420, P0171, P0300, …) so you can prototype joins, pipelines, and apps before licensing.
Tables
| Config | Rows | Description |
|---|---|---|
dtc_codes |
90 | Code registry: DTC, system category, OEM flag/make, fault family, short description, detailed technical explanation |
diagnostic_fixes |
320 | Ranked repair procedures (rank 1 = most likely root cause) with difficulty, parts-cost range, labor hours, step-by-step instructions |
replacement_parts |
449 | Aftermarket part names per fix with catalog search URLs |
dtc_fixes_joined |
320 | Pre-joined analytical view (codes × fixes) for one-file ingestion |
Row identity: SAE rows are unique by dtc_code; OEM rows by (oem_make, dtc_code) —
the same manufacturer-range number legitimately means different things on
different brands.
Quickstart
from datasets import load_dataset
joined = load_dataset("Ichlibitiche/mechanicdb-obd2-repair-sample", "dtc_fixes_joined", split="train")
p0420 = joined.filter(lambda r: r["dtc_code"] == "P0420")
for fix in sorted(p0420, key=lambda r: r["probability_rank"]):
print(fix["probability_rank"], fix["fix_title"], fix["difficulty_level"])
The full dataset
| Full dataset | This sample | |
|---|---|---|
| DTC codes | 15,886 (9,249 SAE + 6,637 OEM / 32 makes) | 90 |
| Ranked repair procedures | 56,561 | 320 |
| Parts mappings | 75,055 | 449 |
| Fault families | 647 | (linked) |
Self-serve commercial licensing with instant download: mechanicdb-public.pages.dev · also on GitHub and Kaggle · explore interactively in the Dataset Sample Explorers Space.
Provenance & license
- Code-to-definition mappings compiled from an MIT-licensed SAE J2012-derived public compilation (attribution preserved in the source repos); repair procedures, difficulty ratings, and cost ranges are original editorial content from a deterministic, test-gated pipeline. Costs are estimates, not quotes.
- License: ODbL v1.0 (attribution + share-alike).
⚠️ Repair steps are educational reference material, not a substitute for the vehicle manufacturer's service manual. High-voltage (hybrid/EV) and SRS/airbag procedures must only be performed by qualified technicians.
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