What does code P27EB mean?

DTC codes / P27xx · Transmission / P27EB

P27EBTransmission Range Control A Position Sensor/Switch Circuit/Open

P27EB is a generic powertrain code indicating that the transmission control module (TCM) has detected an open circuit or invalid signal from the Transmission Range Control A Position Sensor/Switch, which is responsible for confirming the selected gear range. The TCM sets this code when the voltage or resistance on the sensor circuit falls outside the expected range for the current gear selection, often resulting in a default limp-home mode.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaTransmission

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.