P07B3 OBD II Trouble Code Transmission Park Position Sensor/Switch A Circuit Low

How to easily diagnose, repair, and info on causes of a trouble code P07B3 that indicates a low electrical circuit in the A transmission park position sensor circuit.

Symptoms of P07B3 OBD II Trouble Code

  • Vehicle will not start (starter will not engage)
  • Starter will engage with the vehicle in gear
  • An illuminated Service Engine Soon Light
  • Check Engine Light is illuminated
  • Transmission may not shift out of park
  • Transmission may not shift into park

Common Causes of P07B3 OBD II Trouble Code

  • Defective transmission park position sensor/switch
  • Corroded or damaged connector
  • Damaged or faulty wiring
  • Defective PCM

Severity of P07B3 OBD II Trouble Code

The severity of this code varies based on the specific malfunction and the severity level may progress if not corrected in a timely manner. This code could become a safety issue requiring immediate attention if the starter will engage with the vehicle in gear.