Chevrolet P0A9E
DTC P0AC6 Hybrid/EV Battery Temperature Sensor 2 Performance, DTC P0AC7 Hybrid/EV Battery Temperature Sensor 2 Circuit Low Voltage, DTC P0AC8 Hybrid/EV Battery Temperature Sensor 2
Quick answer
For a 2013 Chevrolet Volt (US), verified GM bulletin 18NA342 identifies P0AC6 as Hybrid/EV Battery Temperature Sensor 2 Performance, P0AC7 as Sensor 2 Circuit Low Voltage, and P0AC8 as Sensor 2 Circuit High Voltage. The supplied record is labeled P0A9E, but the bulletin maps P0A9E to Battery Temperature Sensor 1 Circuit High Voltage—not Sensor 2.
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 P0A9E mean?
For a 2013 Chevrolet Volt (US), verified GM bulletin 18NA342 identifies P0AC6 as Hybrid/EV Battery Temperature Sensor 2 Performance, P0AC7 as Sensor 2 Circuit Low Voltage, and P0AC8 as Sensor 2 Circuit High Voltage. The supplied record is labeled P0A9E, but the bulletin maps P0A9E to Battery Temperature Sensor 1 Circuit High Voltage—not Sensor 2.
2. Technical explanation
There is a code/title mismatch in the supplied diagnostic record. Official NHTSA-hosted GM communication 18NA342 lists: P0A9C/P0A9D/P0A9E for Battery Temperature Sensor 1 (performance/low voltage/high voltage respectively), and P0AC6/P0AC7/P0AC8 for Battery Temperature Sensor 2 (performance/low voltage/high voltage respectively). The bulletin concerns battery cooling-system operation, but the supplied evidence does not establish a specific fault cause, repair, or operating restriction for P0A9E.
3. What system is affected?
Hybrid/EV battery temperature sensing and battery cooling-system operation are referenced 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
- Confirm the exact DTC from the vehicle scan result before relying on the diagnostic label, because the supplied record’s P0A9E code conflicts with its Sensor 2 title.
- Arrange qualified Chevrolet/EV service for diagnosis if the code is present. Do not attempt high-voltage battery repair.
10. Step-by-step troubleshooting
- Verify whether the stored code is P0A9E, P0AC6, P0AC7, or P0AC8.
- Use applicable Chevrolet service information and qualified diagnostic procedures. Further troubleshooting steps are not established by the supplied verified evidence.
11. When to contact service
Qualified Chevrolet/EV service is appropriate for diagnostic confirmation and any battery-system work. Urgency is not established by verified evidence.
12. What the service center may check
- Confirm the exact stored DTC and its associated battery temperature sensor designation.
- Evaluate the concern using applicable Chevrolet service information. Specific tests are not established by the supplied evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Chevrolet Volt · 2013 · US
15. Related TSBs / service bulletins
- GM bulletin 18NA342, published November 19, 2018 and hosted by NHTSA as manufacturer communication MC-10155116-9999, identifies battery-temperature-sensor DTC groupings and references battery cooling-system operation.
- The supplied evidence does not establish the bulletin’s complete repair procedure, eligibility, or applicability beyond the listed 2013 Chevrolet Volt (US) record.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official source: NHTSA-hosted GM manufacturer communication 18NA342 (MC-10155116-9999): https://static.nhtsa.gov/odi/tsbs/2018/MC-10155116-9999.pdf
19. Frequently asked questions
What does P0A9E mean according to the verified GM bulletin?
GM bulletin 18NA342 identifies P0A9E as Hybrid/EV Battery Temperature Sensor 1 Circuit High Voltage.
Is P0A9E a Battery Temperature Sensor 2 code?
No. In the verified bulletin, Sensor 2 codes are P0AC6 (Performance), P0AC7 (Circuit Low Voltage), and P0AC8 (Circuit High Voltage).
Can I drive or charge with P0A9E?
Not yet established by verified evidence.
Does the supplied evidence identify a repair?
No. A specific repair is not yet established by verified evidence.