P0C48: Hybrid/EV Battery Pack Coolant Pump A Control Circuit Low
What to do
As P0C47 — expect slower charging and reduced power in warm weather until it is fixed. Ask for the supply to be checked before the pump is condemned; they produce identical symptoms and one is far cheaper.
What this code means
The pack coolant pump's control circuit is reading low — a short to earth, or a driver output that has failed on, which can leave the pump running continuously and flatten the 12-volt battery overnight. The family's argument is at P0C47.
Likely causes
Start here
- Faulty electric coolant pump · moderate
- Corroded or loose connector · easy
- Air trapped in the inverter cooling circuit · moderate
Less common
- Low coolant level · easy
- Open circuit in pump wiring · moderate
Symptoms
Components involved
Information, not instruction
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Community experience
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