Trooper LS V6-3.5L (1998)
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Bank 2 sensor 1 is mounted on the exhaust pipe ahead of the left-hand catalytic converter.
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Bank 2 sensor 2 (automatic transmission) is mounted behind the left-hand catalytic converter.
3. Disconnect the pigtail from the wiring harness.
IMP0RTANT: The pigtail is permanently attached to the sensor. Be careful not to pull the wires out.
NOTE: Do not use a torch to remove an HO2S unless the sensor is being replaced. Using a torch could damage the sensor.
4. Remove the sensor from the exhaust pipe.
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Because of the expansion and contraction of the metal in the exhaust system over time, this may be difficult if the engine temperature is below
48°C (120°F).
Installation Procedure
IMP0RTANT:
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A special anti-seize compound, P/N 5613695, is used on the HO2S threads. This compound consists of glass beads suspended in a liquid graphite
solution. The graphite burns away with engine heat, but the glass beads will remain, making the sensor easier to remove.
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New or service sensors will already have the compound applied to the threads. If a sensor is removed and is to be reinstalled for any reason, the
threads must have anti-seize compound applied.
1. Apply anti-seize compound or the equivalent to the threads of the oxygen sensor, if necessary.
2. Install the oxygen sensor on the exhaust pipe in its original position.
Tighten: Tighten the oxygen sensor to 55 N.m (40 lb in.).
