Audi P0C4A00
Activation of coolant pump 1 for hybrid / high voltage battery malfunction. or • DTC P0CFF00 – Hybrid/EV Battery Pack Coolant Pump Stuck. and/or • DTC P2B2800 – Hybrid/EV Battery P
Quick answer
For a 2022 Audi Q4 e-tron (US), DTC P0C4A00 is documented by Audi in Hybrid Battery Management (BMCe) J840 as “Activation of coolant pump 1 for hybrid / high voltage battery malfunction.” Audi’s bulletin associates it with the dash warning: “Electric drive: fault. Please contact workshop.”
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 P0C4A00 mean?
For a 2022 Audi Q4 e-tron (US), DTC P0C4A00 is documented by Audi in Hybrid Battery Management (BMCe) J840 as “Activation of coolant pump 1 for hybrid / high voltage battery malfunction.” Audi’s bulletin associates it with the dash warning: “Electric drive: fault. Please contact workshop.”
2. Technical explanation
Verified evidence identifies P0C4A00 as a fault recorded in Hybrid Battery Management (BMCe) J840, address word 008C. The supplied Audi/NHTSA bulletin also lists P0CFF00 (Hybrid/EV Battery Pack Coolant Pump Stuck) and P2B2800 (Hybrid/EV Battery Pack Coolant Pump Performance) as DTCs that may be logged with this condition. The evidence does not establish the exact failed component or repair for an individual vehicle.
3. What system is affected?
Hybrid Battery Management (BMCe) J840, address word 008C; the diagnostic title refers to coolant pump 1 for the hybrid/high-voltage battery.
4. How serious is this code?
Not yet established by verified evidence. The documented warning instructs the customer to contact a workshop.
5. Symptoms you may notice
- Dash-panel warning message: “Electric drive: fault. Please contact workshop”.
- P0C4A00 may be logged in Hybrid Battery Management (BMCe) J840, address word 008C.
6. Possible causes
- A hybrid/high-voltage battery coolant-pump-related malfunction is indicated by the documented DTC description.
- The precise root cause is 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 an Audi-qualified workshop in response to the documented “Electric drive: fault. Please contact workshop” message.
- Do not attempt high-voltage battery or coolant-pump repair yourself.
10. Step-by-step troubleshooting
- Have the workshop read faults in Hybrid Battery Management (BMCe) J840, address word 008C.
- Verify whether P0C4A00 is present and whether P0CFF00 and/or P2B2800 are also logged.
11. When to contact service
Contact an Audi workshop. Audi’s documented dash message explicitly says: “Electric drive: fault. Please contact workshop”.
12. What the service center may check
- Retrieve diagnostic trouble codes from Hybrid Battery Management (BMCe) J840, address word 008C.
- Check for the documented associated DTCs P0CFF00 and P2B2800 when applicable.
- Further service checks are not yet established by the supplied verified evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Audi Q4 e-tron · 2022 · US
15. Related TSBs / service bulletins
- Audi Technical Service Bulletin / NHTSA Manufacturer Communication 10227024, published November 7, 2022: applies to 2022 Audi Q4 e-tron quattro vehicles in the supplied evidence. It documents the warning message and P0C4A00, P0CFF00, and/or P2B2800 in Hybrid Battery Management (BMCe) J840.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication PDF 10227024, Audi document A9322832068363_1: https://static.nhtsa.gov/odi/tsbs/2022/MC-10227024-0001.pdf
19. Frequently asked questions
What does P0C4A00 mean on a 2022 Audi Q4 e-tron?
The supplied Audi bulletin describes P0C4A00 as “Activation of coolant pump 1 for hybrid / high voltage battery malfunction.”
What warning may appear with P0C4A00?
Audi documents the dash message: “Electric drive: fault. Please contact workshop”.
Which module stores this code?
Audi identifies Hybrid Battery Management (BMCe) J840, address word 008C.
Can I drive or charge with P0C4A00?
Not yet established by verified evidence.