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Chevrolet P0C5C

Drive Motor 1 Position Sensor Circuit 2 Low Voltage DTC P0C5D: Drive Motor 1 Position Sensor Circuit 2 High Voltage Parts Information Causal Part Description Part Number Qty X HARN

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService evaluation is appropriate because the official bulletin specifies a harness replacement procedure and diagnostic repair verification. Whether service is immediately required is not established by the supplied evidence.
Confidence95%

Quick answer

For 2016–2018 Chevrolet Volt vehicles in the US, DTC P0C5C is identified in GM bulletin 18NA186 as “Drive Motor 1 Position Sensor Circuit 2 Low Voltage.” The bulletin references replacement of the automatic-transmission wiring harness/control-valve-solenoid harness, part number 24285319, followed by diagnostic repair verification.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

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1. What does P0C5C mean?

For 2016–2018 Chevrolet Volt vehicles in the US, DTC P0C5C is identified in GM bulletin 18NA186 as “Drive Motor 1 Position Sensor Circuit 2 Low Voltage.” The bulletin references replacement of the automatic-transmission wiring harness/control-valve-solenoid harness, part number 24285319, followed by diagnostic repair verification.

2. Technical explanation

Verified evidence identifies P0C5C as a low-voltage fault for Drive Motor 1 Position Sensor Circuit 2. The supplied official GM/NHTSA bulletin also lists P0C5D as the corresponding high-voltage code for the same circuit. Bulletin 18NA186 directs technicians to the applicable Service Information procedure for automatic-transmission wiring-harness replacement and to perform Diagnostic Repair Verification afterward.

3. What system is affected?

Drive Motor 1 position sensor circuit 2; the official bulletin’s listed causal part is the automatic-transmission wiring harness/control-valve-solenoid harness.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Not yet established by verified evidence.

6. Possible causes

  • The official bulletin identifies the automatic-transmission wiring harness/control-valve-solenoid harness as the listed causal part for the covered repair.
  • No further root cause is established by the supplied verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Arrange diagnosis by a qualified Chevrolet/GM service provider.
  • Do not attempt high-voltage or transmission-harness repair without the applicable GM service procedures and qualified training.
  • Have diagnostic repair verification performed after repair, as specified in bulletin 18NA186.

10. Step-by-step troubleshooting

  1. Confirm the stored DTC is P0C5C.
  2. Use the applicable GM Service Information diagnostic procedure; the detailed diagnostic steps are not contained in the supplied evidence.
  3. For the bulletin-covered repair, refer to GM Service Information for Automatic Transmission Wiring Harness Replacement.
  4. Perform Diagnostic Repair Verification after the repair, as directed by bulletin 18NA186.

11. When to contact service

Service evaluation is appropriate because the official bulletin specifies a harness replacement procedure and diagnostic repair verification. Whether service is immediately required is not established by the supplied evidence.

12. What the service center may check

  • Retrieve and confirm DTC P0C5C.
  • Follow the GM Service Information procedure for Automatic Transmission Wiring Harness Replacement.
  • If the applicable diagnostic procedure calls for replacement, the bulletin lists HARNESS, A/TRNS WRG CONT VALVE SOL, part number 24285319, quantity 1.
  • Perform Diagnostic Repair Verification after the repair.

13. Possible repair or resolution

  • GM bulletin 18NA186 lists replacement of the automatic-transmission wiring harness/control-valve-solenoid harness as the repair-related procedure.
  • The listed part is 24285319, quantity 1.
  • The bulletin directs completion of Diagnostic Repair Verification.

14. Affected vehicles

15. Related TSBs / service bulletins

  • GM bulletin 18NA186, published through NHTSA as manufacturer communication MC-10166648 on September 17, 2019, includes P0C5C among its additional keywords and lists harness part number 24285319 for the covered repair.
  • Applicability supplied for this diagnostic: 2016–2018 Chevrolet Volt, US.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official source: NHTSA Manufacturer Communication MC-10166648, GM bulletin 18NA186: https://static.nhtsa.gov/odi/tsbs/2019/MC-10166648-9999.pdf

19. Frequently asked questions

What does P0C5C mean on a 2016–2018 Chevrolet Volt?

The supplied official bulletin identifies P0C5C as Drive Motor 1 Position Sensor Circuit 2 Low Voltage.

What repair does the GM bulletin reference?

Bulletin 18NA186 references Automatic Transmission Wiring Harness Replacement in GM Service Information and lists harness part number 24285319, quantity 1.

Can I safely drive or charge with P0C5C?

Not yet established by verified evidence.

Is P0C5C a recall?

Not yet established by verified evidence. The supplied source is an official service bulletin/manufacturer communication, not recall evidence.

20. Sources & verification

ReferenceVerified
Chevrolet P0C5C: Drive Motor 1 Position Sensor Circuit 2 Low Voltage… | EV Diagnostics