P0C47Hybrid/EV Battery Pack Coolant Pump A Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0C47 means the controller sees an electrical fault on the line that commands battery coolant pump A. GM's 2019 tables catch open, short to ground and short to power by current: with the pump on, less than 200 mA or more than 3 A on the control line count as failures, with the pump off less than 120 µA; 4 s within 5 s set a Type B code. Porsche reports P0C4700 on the 2015–2017 Cayenne plug-in hybrid (92A), often with the MIL as the only symptom, and blames corroded ground pin 6B, a corroded pump connector or poor wiring. Audi links it on the 2024 Q4 e-tron to corrosion at splice J1 with reduced power. Bentley warns that on 2025–2026 Continental GT and Flying Spur hybrids it can keep the car from switching to ready mode. P0C48 and P0C49 are the low and high variants.
- What you may notice
- MIL, frequently the only sign
- Electrical or drive system warning with reduced power
- Vehicle refuses to become ready to drive
- Likely causes
- LikelyCorroded or painted ground point or corroded pump connector (Porsche Cayenne 92A)
- PossibleCorroded splice or chafed harness in the pump circuit (Audi Q4 e-tron, Bentley)
- PossibleFailed electric coolant pump or its relay
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.