Troubleshooting DTC of VCU (independently-developed motor) 4.3-6 Trouble code DTC Description Fault causes Recommended countermeasures B1500 Ignition key position signal abnormal Key switch sensor abnormal Replace the key. B1501 High accelerator pedal angle signal voltage High accelerator pedal angle signal voltage Replace the accelerator pedal assembly. B1502 Low accelerator pedal angle signal voltage Low accelerator pedal angle signal voltage Accelerator pedal assembly B1507 Vehicle POST failure Motor or battery failed Inspect the power system. P2304 Vacuum sensor failure Sensor short to ground; sensor short to the power supply; sensor open; sensor signal not in the effective range.
Replace the vacuum sensor. P2310 Vacuum pump failed or vacuum system leaking Vacuum system leaking or vacuum pump working timeout Voltage is within normal range or re-power on P2318 Master cylinder pressure sensor or circuit fault Sensor or circuit failed Replace the master cylinder pressure sensor and inspect the related wire harness. P2319 Master cylinder pressure sensor signal abnormal Sensor failed Replace the master cylinder pressure sensor. P2320 Brake lamp switch sensor or circuit failed Sensor or circuit failed Replace the brake lamp switch sensor and inspect the related wire harness.
P2322 P gear control unit position sensor failed P gear control unit reporting failure Inspect if the P gear engagement/disengagement can be self-recovered, otherwise the P gear control unit assembly needs to be replaced.
P2323 P gear control unit actuator motor failed PCU reporting fault Check if the p-gear engagement/disengagement can be recovered automatically; otherwise, replace the PCU assembly P2324 P gear control unit locking failure PCU reporting fault Check if the p-gear engagement/disengagement can be recovered automatically; otherwise, replace the PCU assembly P2325 P gear control unit unlocking failure PCU reporting fault Check if the p-gear engagement/disengagement can be recovered automatically; otherwise, replace the PCU assembly P2326 P gear control unit unknown status failure PCU reporting fault Check if the p-gear engagement/disengagement can be recovered automatically; otherwise, replace the PCU assembly P0561 Battery voltage abnormal Battery failure or loss of electricity Replace the battery.
U0294 BMS communication loss BMS failed or wire harness fault Inspect the wire harness and the BMS. U0292 MCU communication loss MCU failed or wire harness fault Inspect the wire harness and the MCU. U0155 Instrument communication loss Instrument failed or wire harness fault Inspect the wire harness and the instrument. U0116 A/C communication loss A/C control unit failed or wire harness fault Inspect the wire harness and A/C control unit. U0121 ABS communication loss ABS failed or wire harness fault Inspect the wire harness and the ABS. U0140 BCM communication loss BCM failed or wire harness fault Inspect the wire harness and the BCM.
U0131 EPS communication loss EPS failed or wire harness fault Inspect the wire harness and the EPS.