Code No. P0131: Air/Fuel Ratio Sensor (Lambda Sensor) Low


DIAGNOSIS CONTENT



TROUBLE JUDGMENT


Check Condition
  • Ignition switch: ON
Judgment Criterion
  • Short circuit to earth of air/fuel ratio sensor (Lambda sensor) signal circuit.

DIAGNOSIS CONTENT



TROUBLE JUDGMENT


Check Condition
  • After engine warming up.
Judgment Criterion
  • Air/fuel ratio sensor (Lambda sensor) signal is below the threshold.

PROBABLE CAUSE



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