Fault description

Diagnosis monitors the upper and lower voltage limits of the signals from the oxygen sensor after catalytic converter and the upper limit of the internal resistance.

The fault is detected when the probe voltage is less than 0.498 V and greater than 0.352 V and the resistance is greater than 65534 Ohm.

Possible fault cause:

• Wiring harness of oxygen sensor after catalytic converter defective
• Oxygen sensor after catalytic converter defective