STEP 1. Check the linear air-fuel ratio sensor.
(1) Disconnect the linear air-fuel ratio sensor connector and measure at linear air-fuel ratio sensor side.
(2) Measure the resistance between linear air-fuel ratio sensor connector power supply line and terminal LHFL.Standard value: 2.3 - 4.2 ohms [at 20°C (68°F)]
Is the measured resistance between 2.3 and 4.2 ohms [at 20°C (68°F)]?
Go to Step 2. Replace the linear air-fuel ratio sensor. Then go to Step 5.