STEP 1. Check the left bank heated oxygen sensor (rear).
(1) Disconnect left bank heated oxygen sensor (rear) connector and connect test harness special tool, MD998464, to the connector on the left bank heated oxygen sensor (rear) side.
(2) Measure the resistance between heated oxygen sensor connector terminal power supply line and terminal OHRL line.
(3) Standard value: 11 - 18 Ω [at 20°C (68°F)]
Is the measured resistance between 4.5 and 8.0 ohms [at 20°C (68°F)]?
Go to Step 2. Replace the left bank heated oxygen sensor (rear). Then go to Step 8.