P0C27
Electric/Auxiliary Transmission Fluid Pump A Motor Current Low
The motor current of auxiliary transmission fluid pump A reports a motor current low fault.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
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
Common causes
Ordered by how often each turns out to be the cause.
- Pump load lower than expectedCommon
- Motor winding partially openPossible
Parts involved
- Aux Trans Pump A Motor
P0C27 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.