Chevrolet P0C53
Drive Motor 1 Position Sensor Circuit 1 High Voltage DTC P0C5C: Drive Motor 1 Position Sensor Circuit 2 Low Voltage DTC P0C5D: Drive Motor 1 Position Sensor Circuit 2 High Voltage
Quick answer
For U.S. 2016–2018 Chevrolet Volt vehicles, DTC P0C53 is identified in the supplied evidence as “Drive Motor 1 Position Sensor Circuit 1 High Voltage.” GM bulletin 18NA186 documents replacement of the transmission wiring 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.
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 P0C53 mean?
For U.S. 2016–2018 Chevrolet Volt vehicles, DTC P0C53 is identified in the supplied evidence as “Drive Motor 1 Position Sensor Circuit 1 High Voltage.” GM bulletin 18NA186 documents replacement of the transmission wiring harness, part number 24285319, followed by Diagnostic Repair Verification.
2. Technical explanation
The supplied diagnostic record identifies P0C53 as Drive Motor 1 Position Sensor Circuit 1 High Voltage. The same record also lists P0C5C as Drive Motor 1 Position Sensor Circuit 2 Low Voltage and P0C5D as Drive Motor 1 Position Sensor Circuit 2 High Voltage. Official NHTSA-hosted GM manufacturer communication 18NA186 instructs replacement of the transmission wiring harness (HARNESS, A/TRNS WRG CONT VALVE SOL), part number 24285319, and then Diagnostic Repair Verification. The supplied excerpt does not establish the complete diagnostic criteria, failure mechanism, or whether this repair applies to every instance of P0C53.
3. What system is affected?
Drive Motor 1 position-sensor circuit. The verified bulletin repair references the transmission wiring harness.
4. How serious is this code?
Not yet established by verified evidence. The supplied diagnostic record lists severity as unknown.
5. Symptoms you may notice
Not yet established by verified evidence.
6. Possible causes
- The official bulletin documents the transmission wiring harness as the causal part for the repair procedure described in bulletin 18NA186. A broader cause for every P0C53 occurrence is not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence. The supplied diagnostic record lists safe-to-drive status as unknown.
8. Can I charge the vehicle?
Not yet established by verified evidence. The supplied diagnostic record lists safe-to-charge status as unknown.
9. What you can safely do
- Arrange diagnosis by a qualified Chevrolet/GM service provider.
- Provide the stored DTC P0C53 and ask the service provider to review GM bulletin 18NA186 for applicability.
- Do not attempt high-voltage or transmission wiring repairs yourself.
10. Step-by-step troubleshooting
- A qualified service provider can confirm the stored DTC and perform the applicable diagnostic procedure.
- For the repair described by bulletin 18NA186, the documented procedure is replacement of the transmission wiring harness with part number 24285319, followed by Diagnostic Repair Verification.
11. When to contact service
Service is recommended because the verified manufacturer communication specifies a wiring-harness replacement and diagnostic repair verification. Whether the bulletin applies to a particular vehicle must be confirmed by a qualified Chevrolet/GM service provider.
12. What the service center may check
- Confirm vehicle applicability: Chevrolet Volt, model years 2016–2018, United States.
- Confirm DTC P0C53 and assess applicability of GM bulletin 18NA186.
- If the bulletin procedure applies, replace the transmission wiring harness with part number 24285319.
- Perform Diagnostic Repair Verification after the repair.
13. Possible repair or resolution
- GM bulletin 18NA186 documents replacement of HARNESS, A/TRNS WRG CONT VALVE SOL, part number 24285319.
- The bulletin instructs Diagnostic Repair Verification after harness replacement.
14. Affected vehicles
- Chevrolet Volt · 2016–2018 · US
15. Related TSBs / service bulletins
- GM bulletin 18NA186, published September 17, 2019, is available through NHTSA as manufacturer communication MC-10166648-9999: https://static.nhtsa.gov/odi/tsbs/2019/MC-10166648-9999.pdf
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Verified official source: NHTSA-hosted GM manufacturer communication 18NA186 (MC-10166648-9999), published September 17, 2019: https://static.nhtsa.gov/odi/tsbs/2019/MC-10166648-9999.pdf
19. Frequently asked questions
What does P0C53 mean on the applicable Chevrolet Volt?
The supplied diagnostic record identifies P0C53 as Drive Motor 1 Position Sensor Circuit 1 High Voltage.
Which vehicles are covered by the supplied applicability evidence?
Chevrolet Volt vehicles for model years 2016 through 2018 in the United States.
What repair is documented in GM bulletin 18NA186?
The supplied bulletin excerpt instructs replacement of the transmission wiring harness, part number 24285319, followed by Diagnostic Repair Verification.
Is it safe to drive or charge with P0C53?
Not yet established by verified evidence. Both safe-to-drive and safe-to-charge status are listed as unknown in the supplied diagnostic record.