P0071 OBD II Trouble Code Ambient Air Temperature Sensor Performance

Symptoms of P0071 OBD II Trouble Code

  • Malfunction Indicator Light On
  • Air Conditioning may not perform properly
  • Instrument cluster may not read outside temperature accurately
  • Overhead console may not read outside temperature accurately

Common Causes of P0071 OBD II Trouble Code

  • Open in the signal circuit to the AAT sensor
  • Short to voltage in the signal circuit to the AAT sensor
  • Short to ground in the signal circuit to the AAT sensor
  • AAT sensor faulty
  • Failed PCM - unlikely