OBD-II code · Powertrain (generic, extended)
P27EA Transmission Range Control B Circuit High
The B-channel actuator of the transmission range control reports a circuit high condition. Gear-selector mechanical engagement cannot be requested as expected.
Is it safe to drive with P27EA?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyControl wire shorted to B+
- PossibleOpen actuator coil
- Less likelyConnector pins corroded - high contact resistance
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
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Transmission Range Control Actuator B, Wiring Harness, Tcm
Related codes
- P07EBTransmission Range Control A Circuit High
- P27E7Transmission Range Control B Circuit/Open
- P27E8Transmission Range Control B Circuit Performance
- P27E9Transmission Range Control B Circuit Low
- P27EBTransmission Range Control A Position Sensor/Switch Circuit/Open
- P27ECTransmission Range Control A Position Sensor/Switch Circuit Range/Performance
- P27EDTransmission Range Control A Position Sensor/Switch Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.