P0C2B
Electric/Auxiliary Transmission Fluid Pump Control Module Feedback Signal
The auxiliary transmission fluid pump control module feedback signal reports a feedback signal condition.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
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.
- Feedback signal failedCommon
- Wiring faultPossible
Parts involved
- Aux Trans Pump Control Module
- Wiring Harness
- TCM
P0C2B 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.