OBD-II code · Powertrain (generic)
P0C25 Electric/Auxiliary Transmission Fluid Pump Control Module Circuit High
The auxiliary transmission fluid pump control module circuit reports a circuit high condition. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P0C25?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWire shorted to B+
- PossibleOpen module input
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Aux Trans Pump Control Module, Wiring Harness, Tcm
Related codes
- P0C22Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit High
- P0C23Electric/Auxiliary Transmission Fluid Pump Control Module Circuit/Open
- P0C24Electric/Auxiliary Transmission Fluid Pump Control Module Circuit Low
- P0C26Electric/Auxiliary Transmission Fluid Pump A Motor Current
- P0C27Electric/Auxiliary Transmission Fluid Pump A Motor Current Low
- P0C28Electric/Auxiliary Transmission Fluid Pump A Motor Current High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.