Code No. P0031: Air/Fuel Ratio Sensor (Lambda Sensor) Heater Low


DIAGNOSIS CONTENT



TROUBLE JUDGMENT


Check Condition
  • Air/fuel ratio sensor (Lambda sensor) heater operation mode.
Judgment Criterion
  • Short circuit to earth of air/fuel ratio sensor (Lambda sensor) heater control circuit.

PROBABLE CAUSE



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