OBD-II code · Powertrain (generic, extended)
P27EC Transmission Range Control A Position Sensor/Switch Circuit Range/Performance
The position sensor or switch of transmission range control channel A reports a circuit range/performance condition. The TCM cannot verify the actuator position reliably.
Is it safe to drive with P27EC?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- PossibleDirty or oxidised switch contacts
- PossibleSensor mounting misadjusted
- Less likelySensor element aged beyond calibration window
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
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Range Control Position Sensor A, Wiring Harness, Tcm
Related codes
- P27F0Transmission Range Control B Position Sensor/Switch Circuit Range/Performance
- P27E9Transmission Range Control B Circuit Low
- P27EATransmission Range Control B Circuit High
- P27EBTransmission Range Control A Position Sensor/Switch Circuit/Open
- P27EDTransmission Range Control A Position Sensor/Switch Circuit Low
- P27EETransmission Range Control A Position Sensor/Switch Circuit High
- P27EFTransmission Range Control B Position Sensor/Switch Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.