Chevrolet P0C84
DTC P0C89 Hybrid/EV Battery Temperature Sensor 9 Performance, DTC P0C8A Hybrid/EV Battery Temperature Sensor 9 Circuit Low Voltage, DTC P0C8B Hybrid/EV Battery Temperature Sensor 9
Quick answer
For a 2013 Chevrolet Volt (US), verified GM/NHTSA bulletin 18NA342 identifies P0C84 as Hybrid/EV Battery Temperature Sensor 8 Circuit High Voltage. Service is indicated by the bulletin, but driving, charging, severity, symptoms, and the exact repair are not yet established by verified evidence.
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 P0C84 mean?
For a 2013 Chevrolet Volt (US), verified GM/NHTSA bulletin 18NA342 identifies P0C84 as Hybrid/EV Battery Temperature Sensor 8 Circuit High Voltage. Service is indicated by the bulletin, but driving, charging, severity, symptoms, and the exact repair are not yet established by verified evidence.
2. Technical explanation
The supplied diagnostic title combines multiple battery-temperature-sensor codes, but the verified bulletin specifically identifies P0C84 as: Hybrid/EV Battery Temperature Sensor 8 Circuit High Voltage. The same bulletin separately lists Sensor 9 codes: P0C89 (performance), P0C8A (circuit low voltage), and P0C8B (circuit high voltage).
3. What system is affected?
Hybrid/EV battery temperature sensor circuit, specifically Battery Temperature Sensor 8 according to verified 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
- Arrange diagnosis by a qualified Chevrolet/EV service facility.
- Do not attempt high-voltage battery or battery-sensor repair yourself.
10. Step-by-step troubleshooting
- Use a qualified service facility to follow the applicable manufacturer service procedure. The verified bulletin states, "Perform the following," but the supplied evidence does not include the complete procedure.
11. When to contact service
Contact a Chevrolet dealer or qualified EV service facility for diagnosis, particularly because this code concerns the hybrid/EV battery temperature-sensor circuit.
12. What the service center may check
- Confirm the stored DTC and vehicle applicability.
- Refer to GM/NHTSA manufacturer communication 18NA342 for the applicable service procedure.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Chevrolet Volt · 2013 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication 10155116 / GM bulletin 18NA342, published November 19, 2018. It lists P0C84 as Hybrid/EV Battery Temperature Sensor 8 Circuit High Voltage and also lists Sensor 9 codes P0C89, P0C8A, and P0C8B.
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
Verified official source: NHTSA manufacturer communication PDF 10155116, GM bulletin 18NA342: https://static.nhtsa.gov/odi/tsbs/2018/MC-10155116-9999.pdf
19. Frequently asked questions
What does P0C84 mean for the verified 2013 Chevrolet Volt application?
Verified bulletin 18NA342 identifies P0C84 as Hybrid/EV Battery Temperature Sensor 8 Circuit High Voltage.
Is P0C84 a Battery Temperature Sensor 9 code?
No. The verified bulletin identifies P0C84 as Sensor 8 Circuit High Voltage. It identifies Sensor 9 codes as P0C89, P0C8A, and P0C8B.
Can I drive or charge with P0C84?
Not yet established by verified evidence.