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Chevrolet P0A9C

DTC P0AC6 Hybrid/EV Battery Temperature Sensor 2 Performance, DTC P0AC7 Hybrid/EV Battery Temperature Sensor 2 Circuit Low Vol

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService evaluation is appropriate because the verified evidence concerns Hybrid/EV battery temperature sensing and cooling-system control. The need for service is otherwise not established by the supplied evidence.
Confidence95%

Quick answer

For a 2013 Chevrolet Volt (US), verified GM/NHTSA bulletin evidence identifies P0A9C as Hybrid/EV Battery Temperature Sensor 1 Performance. The supplied record’s title/meaning also references P0AC6 and P0AC7 for Battery Temperature Sensor 2, so the displayed code-to-description pairing is inconsistent.

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 P0A9C mean?

For a 2013 Chevrolet Volt (US), verified GM/NHTSA bulletin evidence identifies P0A9C as Hybrid/EV Battery Temperature Sensor 1 Performance. The supplied record’s title/meaning also references P0AC6 and P0AC7 for Battery Temperature Sensor 2, so the displayed code-to-description pairing is inconsistent.

2. Technical explanation

GM bulletin 18NA342 states that Control Module 2 uses battery temperature sensors to determine Hybrid/EV battery-module temperature and to control battery-cooling-system operation. The bulletin identifies: P0A9C = Battery Temperature Sensor 1 Performance; P0A9D = Battery Temperature Sensor 1 Circuit Low Voltage; P0A9E = Battery Temperature Sensor 1 Circuit High Voltage; P0AC6 = Battery Temperature Sensor 2 Performance; and P0AC7 = Battery Temperature Sensor 2 Circuit Low Voltage.

3. What system is affected?

Hybrid/EV battery temperature sensing and battery cooling-system control, as described by GM bulletin 18NA342.

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

  • Not yet established by 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

  • Do not attempt high-voltage battery or sensor repair yourself.
  • Have the stored DTC and its exact description confirmed using appropriate service information.

10. Step-by-step troubleshooting

  1. Confirm whether the vehicle has P0A9C, P0AC6, P0AC7, or another code. The supplied diagnostic title conflicts with the official bulletin’s code mapping.
  2. GM bulletin 18NA342 is relevant verified information for the 2013 Chevrolet Volt in the US, but the supplied evidence does not provide a diagnostic procedure.

11. When to contact service

Service evaluation is appropriate because the verified evidence concerns Hybrid/EV battery temperature sensing and cooling-system control. The need for service is otherwise not established by the supplied evidence.

12. What the service center may check

  • Confirm the exact DTC stored in the vehicle.
  • Use GM service information applicable to the vehicle to diagnose the reported battery-temperature-sensor-related code.
  • Not yet established by verified evidence whether any specific component, wiring, sensor, or battery assembly requires replacement.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • GM/NHTSA Manufacturer Communication 18NA342, published November 19, 2018 (NHTSA document MC-10155116-9999). It documents the battery temperature sensor DTC mapping and states that Control Module 2 uses these sensors for battery cooling-system control.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

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

19. Frequently asked questions

What does P0A9C mean on the verified GM bulletin?

GM bulletin 18NA342 identifies P0A9C as Hybrid/EV Battery Temperature Sensor 1 Performance.

What codes does the bulletin identify for Battery Temperature Sensor 2?

The bulletin identifies P0AC6 as Hybrid/EV Battery Temperature Sensor 2 Performance and P0AC7 as Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage.

Is this information applicable to a 2013 Chevrolet Volt in the US?

Yes. The supplied applicability record identifies the 2013 Chevrolet Volt, US, and the verified source is GM bulletin 18NA342.

20. Sources & verification

ReferenceVerified
Chevrolet P0A9C: DTC P0AC6 Hybrid/EV Battery Temperature Sensor 2… | EV Diagnostics