EV Diagnostics
Verified EV diagnostic knowledge page

Chevrolet P0C52

Drive Motor 1 Position Sensor Circuit 1 Low Voltage DTC P0C53: Drive Motor 1 Position Sensor Circuit 1 High Voltage DTC P0C5C: Drive Motor 1 Position Sensor Circuit 2 Low Voltage D

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService is appropriate because the verified bulletin specifies a harness replacement and Diagnostic Repair Verification. Whether service is immediately required is not yet established by verified evidence.
Confidence95%

Quick answer

For certain 2016–2018 Chevrolet Volt vehicles in the US, DTC P0C52 is identified in GM/NHTSA bulletin 18NA186 as “Drive Motor 1 Position Sensor Circuit 1 Low Voltage.” The bulletin also addresses P0C53, P0C5C, and P0C5D. Its documented repair is replacement of the transmission wiring harness with 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.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

No sufficiently relevant embeddable video has been accepted for this diagnostic yet.

Videos are supporting material and never override OEM or regulator evidence.

1. What does P0C52 mean?

For certain 2016–2018 Chevrolet Volt vehicles in the US, DTC P0C52 is identified in GM/NHTSA bulletin 18NA186 as “Drive Motor 1 Position Sensor Circuit 1 Low Voltage.” The bulletin also addresses P0C53, P0C5C, and P0C5D. Its documented repair is replacement of the transmission wiring harness with part number 24285319, followed by Diagnostic Repair Verification.

2. Technical explanation

Verified bulletin evidence identifies P0C52 as a low-voltage fault for Drive Motor 1 Position Sensor Circuit 1. Bulletin 18NA186 lists it with P0C53 (Circuit 1 High Voltage), P0C5C (Circuit 2 Low Voltage), and P0C5D (Circuit 2 High Voltage). The documented service procedure calls for replacement of the automatic-transmission wiring harness/control-valve-solenoid harness, part number 24285319, and completion of Diagnostic Repair Verification in GM Service Information.

3. What system is affected?

Drive Motor 1 position-sensor circuit and the transmission wiring harness, based on bulletin 18NA186.

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 verified bulletin documents replacement of the transmission wiring harness as the repair action. A more specific failure mechanism is not yet 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 Chevrolet/GM-qualified service facility.
  • Provide the stored DTC and reference GM/NHTSA bulletin 18NA186 when scheduling service.
  • Do not attempt high-voltage or transmission-harness repair without appropriate manufacturer procedures and qualified service support.

10. Step-by-step troubleshooting

  1. Confirm the stored DTC using suitable diagnostic equipment.
  2. Have a qualified technician evaluate applicability of GM bulletin 18NA186 to the vehicle.
  3. After the documented repair, perform Diagnostic Repair Verification as specified in GM Service Information.

11. When to contact service

Service is appropriate because the verified bulletin specifies a harness replacement and Diagnostic Repair Verification. Whether service is immediately required is not yet established by verified evidence.

12. What the service center may check

  • Check whether the vehicle is a US-market 2016–2018 Chevrolet Volt.
  • Confirm whether P0C52, P0C53, P0C5C, or P0C5D is present.
  • Evaluate the transmission wiring harness under GM Service Information and bulletin 18NA186.
  • Perform Diagnostic Repair Verification after repair.

13. Possible repair or resolution

  • GM bulletin 18NA186 specifies replacing the transmission wiring harness/control-valve-solenoid harness with part number 24285319.
  • The bulletin specifies performing Diagnostic Repair Verification after harness replacement.

14. Affected vehicles

15. Related TSBs / service bulletins

  • GM/NHTSA Manufacturer Communication 18NA186, published September 17, 2019 (NHTSA document MC-10166648-9999): documents replacement of transmission wiring harness part number 24285319 and Diagnostic Repair Verification for P0C52, P0C53, P0C5C, and P0C5D.

16. Recall information

No recall relationship is established by verified evidence.

17. Official manufacturer information

Verified official source: NHTSA-hosted GM Manufacturer Communication 18NA186, https://static.nhtsa.gov/odi/tsbs/2019/MC-10166648-9999.pdf. Applicability supplied: 2016–2018 Chevrolet Volt, US.

19. Frequently asked questions

What does P0C52 mean?

The verified GM/NHTSA bulletin identifies P0C52 as Drive Motor 1 Position Sensor Circuit 1 Low Voltage.

Which Chevrolet vehicles are covered by the supplied applicability data?

The supplied applicability data identifies US-market 2016–2018 Chevrolet Volt vehicles.

What repair does bulletin 18NA186 specify?

It specifies replacement of the transmission wiring harness with part number 24285319, followed by Diagnostic Repair Verification.

Is P0C52 safe to drive or charge with?

Not yet established by verified evidence.

20. Sources & verification

ReferenceVerified
Chevrolet P0C52: Drive Motor 1 Position Sensor Circuit 1 Low Voltage… | EV Diagnostics