What does code P07B3 mean?

Q: What does code P07B3 mean?

Transmission Park Position Sensor/Switch A Circuit Low. P07B3 means the transmission control module (TCM) has detected an abnormally low voltage on the signal circuit for the park position sensor or switch, often called switch A. The sensor reports whether the transmission is mechanically in Park, and a low signal tells the computer the circuit is shorted to ground or the sensor has failed.

DTC codes / P07xx · Transmission / P07B3

P07B3Transmission Park Position Sensor/Switch A Circuit Low

P07B3 means the transmission control module (TCM) has detected an abnormally low voltage on the signal circuit for the park position sensor or switch, often called switch A. The sensor reports whether the transmission is mechanically in Park, and a low signal tells the computer the circuit is shorted to ground or the sensor has failed.

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.