P0709 OBD II Trouble Code Transmission Range Sensor A Circuit High

Symptoms of P0709 OBD II Trouble Code

  • Faulty transmission range sensor
  • Faulty wiring
  • (Rarely) Faulty PCM or TCM

Common Causes of P0709 OBD II Trouble Code

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Severity of P0709 OBD II Trouble Code

After the second key cycle, the PCM/TCM will turn on the check engine light and force the transmission into ?Limp-home? or ?safe-mode?. There will be an obvious power loss, most noticeable when taking off from complete stops. When in this mode, the transmission starts off in third gear which is hard on the internal clutches in the transmission.