Heated Oxygen Sensor (HO2S) 1 Replacement

TOOLS REQUIRED
J 39194-B Heated Oxygen Sensor Wrench

REMOVAL PROCEDURE
The heated oxygen sensor may be difficult to remove when engine temperature is below 48°C (120°F). Excessive force may damage threads in exhaust manifold or exhaust pipe.




1. Disconnect the heated oxygen sensor (HO2S) electrical connector.
2. Use the J 39194-B to remove the heated oxygen sensor (HO2S).

INSTALLATION PROCEDURE




1. Coat the threads of heated oxygen sensor/catalyst monitor with anti seize compound P/N 12377953, or equivalent if necessary.

IMPORTANT: A special anti seize compound is used on the heated oxygen sensor threads. The compound consists of graphite suspended in fluid and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the compound applied to the threads. If a sensor is removed from an engine and if for any reason is to be reinstalled, the threads must have anti seize compound applied before reinstallation.

2. Install the heated oxygen sensor (HO2S).

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten
Use the J 39194-B to tighten the sensor to 42 N.m (31 lb ft).

3. Connect the HO2S electrical connector.