Heated Oxygen Sensor Heater Inspection

1. Disconnect the heated oxygen sensor connector.







2. Measure the resistance between heated oxygen sensor terminals C and D for 4-pin connector or B and C for 3-pin connector by using an ohmmeter.
- If not as specified, replace the heated oxygen sensor.
- If okay, inspect related harness or connectors.

Specification
Approx: 6 ohms