CHECK REAR OXYGEN SENSOR.

Measure the resistance between rear oxygen sensor terminals.

Terminals

No. 4 — No. 3

QUESTION

Is the resistance less than 1 Ω?

Yes No

Replace the rear oxygen sensor.

Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the fault condition, and reperform the check.

NOTE:

In this case, there may be a temporary connector contact failure.