P02FA OBD II Trouble Code Diesel Intake Air Flow Position Sensor Min/Max Stop Performance

How to quickly diagnose, repair, and causes of a P02FA diesel code which indicates a minimum or maximum stop performance problem in the diesel intake air flow position sensor circuit.

Symptoms of P02FA OBD II Trouble Code

  • Malfunction Indicator Light On
  • Possible low idle speed only
  • No EGR System operation
  • No Regeneration of the diesel particulate filter to burn off the soot build up (won?t burn off soot out of the DPF catalyst)

Common Causes of P02FA OBD II Trouble Code

  • Open in the signal circuit to the DIAFPS sensor - possible
  • Short to voltage in the signal circuit to the DIAFPS sensor - possible
  • Short to ground in the signal circuit to the DIAFPS sensor - possible
  • Failed DIAFPS Sensor - likely
  • Failed PCM - unlikely

Severity of P02FA OBD II Trouble Code

Severity in all cases will be not severe. Since they are electrical failures, the PCM can compensate adequately for them.