What does code P07B8 mean?

Q: What does code P07B8 mean?

Transmission Park Position Sensor/Switch B Circuit/Open. P07B8 indicates that the transmission control module has detected an open circuit or abnormal voltage on the signal circuit for Park Position Sensor/Switch B, which is used to confirm the transmission is mechanically locked in Park. The computer compares expected voltage on the sensor's signal line against what it actually sees and flags the code when the circuit is open or the signal is missing.

DTC codes / P07xx · Transmission / P07B8

P07B8Transmission Park Position Sensor/Switch B Circuit/Open

P07B8 indicates that the transmission control module has detected an open circuit or abnormal voltage on the signal circuit for Park Position Sensor/Switch B, which is used to confirm the transmission is mechanically locked in Park. The computer compares expected voltage on the sensor's signal line against what it actually sees and flags the code when the circuit is open or the signal is missing.

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.