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DTC codes / P27xx · Transmission / P27ED

P27EDTransmission Range Control A Position Sensor/Switch Circuit Low

P27ED indicates that the transmission control module (TCM) has detected an abnormally low voltage or signal on the circuit for Transmission Range Control A, which is the sensor or switch that tells the computer which gear range the driver has selected. The TCM compares this signal to other range inputs and sets the code when the voltage stays below the expected threshold for a calibrated time.

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.

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