Source: https://gsx-s.info/suzuki-error-codes/
Timestamp: 2019-04-23 21:52:21+00:00

Document:
Listed below are the Suzuki error codes, if your Suzuki GSXS has a problem with the engine it will generally throw a code on the dash, showing the Suzuki FI light which can be read to tell you what the error is. The errors will show on the dash when set to dealer mode with a three figure code beginning with C–.
The Suzuki FI or Suzuki F1 light is a common recurrence on Suzuki GSXS usually because of modifications and is more accurately called Suzuki MIL or Suzuki Malfunction Indicator Light.
•Do not disconnect the coupler from ECM, battery cable from battery, ECM ground wire from engine or main fuse before confirming DTC stored in memory. Such disconnection will erase memorized information in ECM memory.
•Before checking DTC, read self-diagnosis function “User mode and dealer mode” carefully to have good understanding as to what functions are available and how to use it.
•DTC can be checked by using the SDS.
2)Connect the special tool to the mode select coupler (6P) at the wiring harness.
3)Start the engine or crank the engine for more than 4 seconds.
4)Turn the special tool’s switch ON.
5)Check the DTC to determine the malfunction part.
C12 P0335 CKP sensor circuit malfunction The signal does not reach ECM for 2 sec. or more, after receiving the starter signal.
C13 P0105-H / P0105-L IAP sensor circuit high voltage / low voltage The sensor output voltage is higher than 4.85 V. / The sensor output voltage is lower than 0.5 V.
C14 *1 P0120-H / P0120-L TP sensor circuit high voltage / low voltage The sensor output voltage is higher than 4.8 V. / The sensor output voltage is lower than 0.2 V.
C15 P0115-H / P0115-L ECT sensor circuit high voltage / low voltage The sensor output voltage is higher than 4.85 V. / The sensor output voltage is lower than 0.15 V.
C16 P0500 Vehicle speed sensor (Front) circuit malfunction The speed sensor signal is not input for more than 3 sec.
C17 P1750-H / P1750-L AP sensor circuit high voltage / low voltage The sensor output voltage is higher than 4.85 V. / The sensor output voltage is lower than 0.5 V.
C21 P0110-H / P0110-L IAT sensor circuit high voltage / low voltage The sensor output voltage is higher than 4.85 V. / The sensor output voltage is lower than 0.15 V.
C23 P1651-H / P1651-L TO sensor circuit high voltage / low voltage The sensor output voltage is higher than 4.80 V. / The sensor output voltage is lower than 0.20 V.
C24 P0351 Ignition system #1 malfunction Ignition coil #1 signal is interrupted by 8 times or more continuity although CKP signal is detected.
C25 P0352 Ignition system #2 malfunction Ignition coil #2 signal is interrupted by 8 times or more continuity although CKP signal is detected.
C26 P0353 Ignition system #3 malfunction Ignition coil #3 signal is interrupted by 8 times or more continuity although CKP signal is detected.
C27 P0354 Ignition system #4 malfunction Ignition coil #4 signal is interrupted by 8 times or more continuity although CKP signal is detected.
C28 P1655 STVA circuit malfunction STVA control signal is not supplied from the ECM. ECM does not receive communication signal from the STVA or operation voltage does not reach STVA.
C29 P1654-H / P1654-L STP sensor circuit high voltage / low voltage The sensor output voltage is higher than 4.85 V. / The sensor output voltage is lower than 0.15 V.
C31 P0705 GP switch circuit malfunction Gear position signal voltage is lower than the specified value.
C32 P0201 Fuel injector #1 circuit malfunction Fuel injector #1 signal is interrupted by 4 times or more continuity although CKP signal is detected.
C33 P0202 Fuel injector #2 circuit malfunction Fuel injector #2 signal is interrupted by 4 times or more continuity although CKP signal is detected.
C34 P0203 Fuel injector #3 circuit malfunction Fuel injector #3 signal is interrupted by 4 times or more continuity although CKP signal is detected.
C35 P0204 Fuel injector #4 circuit malfunction Fuel injector #4 signal is interrupted by 4 times or more continuity although CKP signal is detected.
C40 P0505 ISC valve circuit malfunction The circuit voltage of motor drive is unusual.
C41 P0230-H / P0230-L Unexpected power supply to fuel pump / Unexpected power cut to fuel pump Voltage is applied to fuel pump although FP relay is turned OFF. / No voltage is applied to fuel pump although FP relay is turned ON.
C41 P2505 ECM power input signal circuit malfunction No voltage is applied to the ECM, although the ignition switch is turned ON.
C44 P0130 HO2 sensor circuit malfunction HO2 sensor output voltage is not input to ECM during engine operation and running condition.
C44 P0135 HO2 sensor heater circuit malfunction The heater can not operate so that heater operation voltage is not supplied to the HO2 sensor heater circuit.
C46 P1657-H / P1657-L EXCVA position sensor circuit high voltage / low voltage The sensor output voltage is higher than 4.90 V. / The sensor output voltage is lower than 0.14 V.
C46 P1658 EXCVA motor circuit malfunction EXCVA control signal is not supplied from the ECM. ECM does not receive communication signal from the EXCVA or operation voltage does not reach EXCVA motor.
C49 P1656 PAIR control solenoid valve circuit malfunction PAIR control solenoid valve voltage is not input to ECM.
C60 P0480 Cooling fan relay circuit malfunction Cooling fan relay signal is not input to ECM.
C62 *2 P0443 *2 EVAP system purge control solenoid valve circuit malfunction EVAP system purge control solenoid valve voltage is not input to ECM.
C65 P0506 ISC valve, lower than desired rpm Idle speed dropped lower than desired idle speed by more than specified range.
C65 P0507 ISC valve, higher than desired rpm Idle speed rose higher than desired idle speed by more than specified range.
C91 P1500 Vehicle speed sensor (Rear) circuit malfunction The speed sensor signal is not input for more than 3 sec.
In the LCD (DISPLAY) panel, the DTC is indicated from small code to large code.
*1 To get the proper signal from the TP sensor, the sensor basic position is indicated in the LCD (DISPLAY) panel. The DTC is indicated in three digits. In front of the three digits, a line appears in any of the three positions, upper, middle or lower line. If the indication is upper or lower line, adjust the TP sensor.

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