P27BA
Pressure Control Solenoid N Stuck On
Pressure control solenoid N stays in the activated state when commanded off.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Solenoid spool stuck in open positionCommon
- TCM output driver stuck onPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- Pressure Control Solenoid N
- Valve Body
P27BA 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.