Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2009MALIBU V6-3.6LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORSERVICE AND REPAIRHEATED OXYGEN SENSOR REPLACEMENT - BANK 2 SENSOR 1
2009 Chevrolet Malibu V6-3.6L
Heated Oxygen Sensor Replacement - Bank 2 Sensor 1
2009 Chevrolet Malibu V6-3.6LSECTION Heated Oxygen Sensor Replacement - Bank 2 Sensor 1
Heated Oxygen Sensor Replacement - Bank 2 Sensor 1
Removal Procedure
Caution: Refer to Heated Oxygen and Oxygen Sensor Caution (Heated Oxygen and Oxygen Sensor Caution).
1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (Service and Repair).
2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement (Air Cleaner Outlet Duct Replacement).
3. Remove the connector position assurance (CPA) retainer (3) from the HO2S electrical connection.
4. Disconnect the engine wiring harness electrical connector (2) from the heated oxygen sensor (HO2S) electrical connector (3).
5. Remove the HO2S electrical connector clip from the engine wiring harness tab.
6. Remove the HO2S from the exhaust manifold.
Installation Procedure
Note: A special anti-seize compound is used in the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to reinstalled, the threads must have anti-seize compound applied before the reinstallation.
1. If reinstalling the old sensor, coat the threads with anti-seize compound GM P/N 12377953, or equivalent.
Caution: Refer to Fastener Caution (Fastener Caution).
2. Install the HO2S to the exhaust manifold and tighten the sensor to 42 Nm (31 lb ft).
3. Connect the engine wiring harness electrical connector (2) to the HO2S electrical connector (3).
4. Install the HO2S electrical connector clip to the engine wiring harness tab.
5. Install the CPA retainer (3) to the HO2S electrical connection.
6. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement (Air Cleaner Outlet Duct Replacement).
7. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (Service and Repair).
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.