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Home >> Jeep >> 1989 >> Comanche Eliminator, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> 4.0L MPFI CEC Testing >> System Testing >> (O2) Sensor Heater Test >> Oxygen (O2) Sensor Heating Element Test

Oxygen (O2) Sensor Heating Element Test

Disconnect O2 sensor connector. Connect an ohmmeter to terminals "A" and "B" (marked on connector) of O2 sensor connector. Resistance should be between 5-7 ohms. Replace sensor if ohmmeter indicates an infinity reading.