HHR L4-2.2L (2007)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor 1 Replacement
Heated Oxygen Sensor 1 Replacement
Removal Procedure
Notice: The oxygen sensor uses a permanently attached pigtail and connector. Do not remove the pigtail from the oxygen sensor. Damage to or removal
of the pigtail connector could affect proper operation of the oxygen sensor.
Notice: The use of excessive force may damage the threads in the exhaust manifold/pipe.
Important: The in-line connector and louvered end must be kept clear of grease, dirt or other contaminants. Avoid using cleaning solvents of any type.
DO NOT drop or roughly handle the heated oxygen sensor (HO2S).
Important: The HO2S may be difficult to remove when the engine temperature is less than 48°C (120°F).
1. Remove the exhaust manifold heat shield.
2. If equipped with a automatic transaxle, perform the following steps, remove the connector position assurance (CPA) retainer (2).
3. Disconnect the engine harness electrical connector (3) from the HO2S.
