5. Disconnect The O2 Sensor

Turn the ignition off.

Disconnect the O2 Sensor harness connector of the affected sensor.

Turn the ignition on.

With the DRB III(R), monitor the O2 Sensor Signal voltage.

Is the O2 Sensor voltage more than 0.15 volts? 

1. Yes  >>
   NOTE: Determine the cause of any contamination before replacing the sensor. Inspect for the following before replacing the O2 Sensor.
   • Fuel contamination.
   • Engine oil or coolant consumption.
   • Use of improper RTV sealant.

Replace the O2 Sensor if none of the above conditions are present. See FUEL SYSTEM article.

See POWERTRAIN VERIFICATION TEST - VER 2  .

1. No  >> Go To 6