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.
2007 Chevrolet Impala LS, 3.5 NFACTORY OEM SERVICE PROCEDURE
Heated Oxygen Sensor (HO2S) 1 Connector End View
Heated Oxygen Sensor (HO2S) 1 Connector Parts Information
Connector Part Information
|
Terminal Part Information
|
Heated Oxygen Sensor (HO2S) 1 Connector Terminal Identification
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| A | TN/WH | 3111 | HO2S Low Signal Sensor 1 |
| B | PU/WH | 3110 | HO2S High Signal Sensor 1 |
| C | GY/WH | 3113 | HO2S Heater Low Control Sensor 1 |
| D | PK/BK | 5293 | Ignition 1 Voltage |
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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