Oxygen Sensor Heater

O2 Sensor Heater Test:

1. Using an ohmmeter, check the resistance between terminals "A" and "C".
2. If not 3 to 1,000 Ohms, replace the Heated Oxygen Sensor.

Note: The On-Board Diagnostic System should contain a code 33 if the oxygen sensor malfunctions. For information regarding trouble codes, refer to Testing and Inspection