DTC Nissan C1726 Short Explanation
Channel: Maxidot
Date: 2020-07-12

The video focuses on the basic Nissan specific diagnostic error code.
Contents:
0:21 Basic DTC analysis according to OBD2 protocol standard.
1:48 Insight into programming
- an explanation of what a bit is and how a byte is formed
- decoding the Error Code to the base programming
2:58 A diagnostically understandable description of the Diagnostic Trouble Code
3:05 Basic error definition
- Possible causes or errors of the car and its parts describing the mentioned error

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Make
Nissan
Code
C1726
Definition
Barometric Pressure Circuit Low
Description
The barometric pressure is measured by the Inlet Air Temperature or Pressure Sensor, which is located on the Air Cleaner Assembly There is a key on check and a rationality check At key on, the readings for the Intake Manifold Pressure Sensor, Exhaust Gas Pressure Sensor, and Inlet Air Pressure Sensor are compared This fault code occurs if the inlet air pressure reading is different from the other two During normal engine operation the rationality check verifies the inlet air pressure is reading an unreasonable value for a calibrated period of time then an error is recorded The key-on portion of the rationality will light the MIL immediately after the diagnostic runs and fails The rationality portion is a one trip fault During this time the Powertrain Control Module PCM uses an estimated barometric pressure The PCM turns off the MIL when the diagnostic runs and passes in four consecutive drive cycles
Cause
5-VOLT SUPPLY CIRCUIT OPEN OR SHORTED TO GROUNDINLET AIR PRESSURE SIGNAL CIRCUIT SHORTED TO GROUNDINLET AIR PRESSURE SIGNAL CIRCUIT SHORTED TO THE K916 SENSOR GROUND CIRCUITINLET AIR PRESSURE SIGNAL CIRCUIT OPEN or HIGH RESISTANCEINLET TEMPERATURE or PRESSURE SENSORPOWERTRAIN CONTROL MODULE PCM