P07B9

Transmission Park Position Sensor/Switch B Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–67 (est.)

Symptoms

Check Engine light comes on
Problems starting the engine (the car 'thinks' it is not in park)
Incorrect display of gear selector position
The car may roll on level ground when 'parked'
Activating transmission emergency mode

Causes

Open or short circuit in the sensor circuit
Parking position sensor malfunction
Connector problems or contact corrosion
Transmission control module (TCM) malfunction
Wiring harness damage

How to Fix

Check the integrity of the sensor circuit (resistance, voltage)
Inspect connectors and contacts for corrosion or damage
Check the functionality of the parking position sensor
If necessary, replace the sensor or repair the circuit
Scan the TCM for additional trouble codes

Related codes

P07B8 P07BA P0705