Oxygen Sensor: Locations

Top of the Engine (LZE, LZ4, LZ9)




1 - Manifold Absolute Pressure (MAP) Sensor
2 - Throttle Body
3 - Intake Manifold
4 - Intake Manifold Tuning (IMT) Valve Solenoid (LZ9)
5 - Camshaft Position (CMP) Sensor
6 - Heated Oxygen Sensor (HO2S) 1
7 - Ignition Control Module (ICM)

Rear of the Engine (LZE, LZ4, LZ9)




1 - Throttle Body
2 - Ignition Control Module (ICM)
3 - Heated Oxygen Sensor (HO2S) 1
4 - Engine Coolant Heater
5 - Engine Oil Level Switch
6 - Crankshaft Position (CKP) Sensor
7 - Knock Sensor (KS) Bank 1

Underbody




1 - Heated Oxygen Sensor (HO2S) 2