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Chevrolet P0C8B

1. Vehicle in Service Mode. 2. Perform the Diagnostic System Check - Vehicle. Refer toDiagnostic System Check - Vehicle in SI. 3. Refer to the preceding Diagnostic Trouble Codes li

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService evaluation is appropriate because the verified manufacturer procedure requires GM Service Information diagnostic steps for a Hybrid/EV battery temperature sensor circuit code.
Confidence95%

Quick answer

For a 2013 Chevrolet Volt (US), DTC P0C8B is identified in GM bulletin 18NA342 as “Hybrid/EV Battery Temperature Sensor 9 Circuit High Voltage.”

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

Video guides

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DTC Chevrolet P0C8B Short ExplanationMaxidot Chevrolet

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1. What does P0C8B mean?

For a 2013 Chevrolet Volt (US), DTC P0C8B is identified in GM bulletin 18NA342 as “Hybrid/EV Battery Temperature Sensor 9 Circuit High Voltage.”

2. Technical explanation

Verified evidence links P0C8B to the Hybrid/EV battery temperature sensor 9 circuit and specifically describes a high-voltage circuit condition. The cited GM service bulletin directs technicians to place the vehicle in Service Mode, perform the Diagnostic System Check - Vehicle, and review the preceding battery-temperature-sensor DTC list in Service Information (SI).

3. What system is affected?

Hybrid/EV battery temperature sensor 9 circuit.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A stored P0C8B diagnostic trouble code may be present. No driver-visible symptoms are established by the supplied verified evidence.

6. Possible causes

  • The supplied evidence establishes a Hybrid/EV Battery Temperature Sensor 9 Circuit High Voltage condition. It does not establish a specific failed component or root cause.

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 battery or sensor-circuit repair yourself.
  • Provide the service provider with DTC P0C8B and the applicable bulletin reference, 18NA342.

10. Step-by-step troubleshooting

  1. Use the manufacturer-directed diagnostic process: place the vehicle in Service Mode.
  2. Perform the Diagnostic System Check - Vehicle using GM Service Information (SI).
  3. Review the preceding battery-temperature-sensor DTC list to determine whether identified battery temperature sensor DTCs are set.

11. When to contact service

Service evaluation is appropriate because the verified manufacturer procedure requires GM Service Information diagnostic steps for a Hybrid/EV battery temperature sensor circuit code.

12. What the service center may check

  • Confirm P0C8B and check for the battery temperature sensor DTCs identified in bulletin 18NA342.
  • Perform the Diagnostic System Check - Vehicle in GM Service Information.
  • Follow the applicable GM SI diagnostic procedure after reviewing the preceding DTC list.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied bulletin excerpt provides diagnostic direction but does not provide a verified repair outcome.

14. Affected vehicles

15. Related TSBs / service bulletins

  • GM bulletin 18NA342, published through NHTSA as Manufacturer Communication PDF 10155116 on November 19, 2018. It identifies P0C8B as “Hybrid/EV Battery Temperature Sensor 9 Circuit High Voltage” and directs Service Mode, Diagnostic System Check - Vehicle, and review of preceding battery temperature sensor DTCs.

16. Recall information

  • No recall information is established by the supplied verified evidence.

17. Official manufacturer information

Official source: NHTSA-hosted GM Manufacturer Communication 10155116, bulletin 18NA342: https://static.nhtsa.gov/odi/tsbs/2018/MC-10155116-9999.pdf

19. Frequently asked questions

What does P0C8B mean on a 2013 Chevrolet Volt?

GM bulletin 18NA342 identifies P0C8B as “Hybrid/EV Battery Temperature Sensor 9 Circuit High Voltage.”

Which vehicle is covered by the supplied evidence?

The supplied applicability evidence identifies a 2013 Chevrolet Volt for the US market.

Does the supplied evidence confirm that the battery, sensor, or wiring must be replaced?

No. A specific root cause or repair is not yet established by verified evidence.

Is it safe to drive or charge with P0C8B?

Not yet established by verified evidence.

20. Sources & verification

ReferenceVerified
Chevrolet P0C8B: 1. Vehicle in Service Mode. 2. Perform the Diagnostic… | EV Diagnostics