OBD-II code · Powertrain (generic)
P0C23 Electric/Auxiliary Transmission Fluid Pump Control Module Circuit/Open
The auxiliary transmission fluid pump control module circuit reports a circuit/open condition.
Is it safe to drive with P0C23?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyOpen in module circuit
- PossibleOpen module input
- Less likelyPin pushed back out of connector body
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
- P0C20Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit/Open
- P0C21Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit Low
- P0C22Electric/Auxiliary Transmission Fluid Pump Phase U-V-W Circuit High
- P0C24Electric/Auxiliary Transmission Fluid Pump Control Module Circuit Low
- P0C25Electric/Auxiliary Transmission Fluid Pump Control Module Circuit High
- P0C26Electric/Auxiliary Transmission Fluid Pump A Motor Current
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.