P27F5
Gear Shift Lock Solenoid/Actuator A Stuck Off
The shift lock solenoid for selector lever A does not engage when commanded. The selector can be moved without the safety interlock active.
- 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.
- Lock actuator failed mechanicallyCommon
- Open in solenoid control wirePossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- Shift Lock Solenoid A
- Shift Lock Actuator A
- TCM
P27F5 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.