P06A9 OBD II Trouble Code Sensor Reference Voltage D Circuit Range/Performance

How to quickly diagnose, repair, and info on causes of a P06A9 trouble code which indicates a detected out of range or performance problem within the Dsensor reference voltage circuit.

Symptoms of P06A9 OBD II Trouble Code

  • Failure of the transmission to shift between sport and economy modes
  • Transmission shifting malfunctions
  • Delayed (or no) transmission engagement
  • Failure of the transmission to switch between all-wheel and two-wheel drive modes
  • Failure of the transfer case to shift from low to high gear
  • Lack of front differential engagement
  • Lack of front hub engagement
  • Erratic or inoperative speedometer/odometer

Common Causes of P06A9 OBD II Trouble Code

  • Bad sensor
  • Defective or blown fuses and/or fusible links
  • Faulty system power relay
  • Open circuits and/or connectors

Severity of P06A9 OBD II Trouble Code

The severity of this DTC depends upon which sensor circuit is experiencing the abnormal voltage situation. Other stored codes must be considered before a determination of severity can be made.