Oxygen Sensor: Service and Repair

REMOVAL AND INSTALLATION
1. Disconnect battery ground cable.

NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the Powertrain Control Module (PCM) relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.

2. Disconnect engine control sensor wiring from Heated Oxygen Sensors (HO2S).
3. Raise vehicle on hoist.
4. Remove heated oxygen sensors from exhaust manifolds using Oxygen Sensor Wrench T94P-9472-A.

NOTE: If excessive force is needed to remove a heated oxygen sensor, lubricate the heated oxygen sensor with penetrating oil prior to removal.

5. To install, reverse Removal procedure. Tighten heated oxygen sensors to 34-46 Nm (26-34 lb ft).