Code No. P2A00: Air/Fuel Ratio Sensor (Lambda Sensor) Performance


DIAGNOSIS CONTENT



TROUBLE JUDGMENT


Check Conditions
  • Oxygen concentration is normal.
  • Diagnosis released.
  • Influence of injection quantity on the air/fuel ratio sensor (Lambda sensor) is unique.
Judgment Criterion
  • The oxygen concentration measured in thrust is above the sum of the calculated oxygen concentration and tolerance band.

DIAGNOSIS CONTENT



TROUBLE JUDGMENT


Check Conditions
  • Oxygen concentration is normal.
  • Diagnosis released.
  • Influence of injection quantity on the air/fuel ratio sensor (Lambda sensor) is unique.
Judgment Criterion
  • The oxygen concentration measured in thrust is below the difference of the calculated oxygen concentration and negative tolerance band.

PROBABLE CAUSE



  • Failed air/fuel ratio sensor (Lambda sensor)
  • Failed electrical harness in air/fuel ratio sensor (Lambda sensor) circuit