Colorado 4WD L5-3.7L (2007)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor 1 Replacement
Heated Oxygen Sensor 1 Replacement
Tools Required
J 39194-B Heated Oxygen Sensor Wrench
Notice: When replacing the HO2S perform the following:
* A code clear with a scan tool, regardless of whether or not a DTC is set
* HO2S heater resistance learn reset with a scan tool, where available
Perform the above in order to reset the HO2S resistance learned value and avoid possible HO2S failure.
Notice: Refer to Heated Oxygen and Oxygen Sensor Notice.
Removal Procedure
1. Remove the connector position assurance (CPA) retainer.
2. Disconnect the engine wiring harness electrical connector (1) from the heated oxygen sensor (HO2S) electrical connector.
Notice: Refer to Excessive Force and Oxygen Sensor Notice.
3. Using the J 39194-B remove the HO2S (2) from the exhaust manifold.
Installation Procedure
Important: Use special anti-seize compound on the HO2S threads. The compound consists of graphite suspended in fluid and glass beads. The
graphite burns away, but the glass beads remain, making the sensor easier to remove. New service sensors already have the compound applied
to the threads. If you remove an oxygen sensor and if for any reason you must install the same oxygen sensor, apply the anti-seize compound to
the threads before reinstallation.
