P27D1
Pressure Control Solenoid S Performance/Stuck Off
Pressure control solenoid S is commanded on but does not produce the expected pressure. Spool stuck closed or hydraulic feed restricted.
- 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 closed positionCommon
- Hydraulic feed restricted by debrisPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- Pressure Control Solenoid S
- Valve Body
P27D1 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.