Powertrain
Definition only
Lights the check engine lamp
P27F4: Gear Shift Lock Solenoid/Actuator A Performance/Stuck On
Standardized SAE J2012 code · P27xx — Transmission
What does P27F4 mean?
The shift lock solenoid for selector lever A stays engaged when release is commanded. Driver cannot move the selector out of Park or away from the locked gate.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
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
- High Lock actuator mechanically stuck
- Medium Control driver stuck on
- Low Carbon or debris buildup preventing free movement
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P27F4 on the same make and model first.
P27F4 in the community
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