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.
2008 Jeep Commander 4WD V6-3.7LFACTORY OEM SERVICE PROCEDURE
Sensor-Oxygen-Left Rear
Component ID: 512
Component : SENSOR-OXYGEN-LEFT REAR
Connector:
Name : SENSOR-OXYGEN-LEFT REAR
Color :
# of pins : 4
Qualifier : (GAS)
Pin Circuit Description
1 Z42 20BK/LG GROUND
2 K299 20BR/OR O2 1/2 HEATER CONTROL
3 K904 20DB/DG O2 RETURN (DOWNSTREAM)
3 K904 20DB/WT O2 RETURN (DOWNSTREAM)
4 K141 20DB/YL O2 1/2 SIGNAL
Component Location - 21
Component Location - 23
Component Location - 28
Factory Service Tools
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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.
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