ACDelco Heated Oxygen Sensor

The ACDelco Heated Oxygen Sensor (also called an O2 sensor or lambda sensor) measures the oxygen content in the exhaust stream. It sends that data to the engine control module so the ECM can fine-tune the air-fuel mixture. A properly working sensor helps the engine run efficiently, keeps emissions in check, and supports good fuel economy and drivability.

Key Features:

• Built-in heating element brings the sensor to operating temperature quickly, so the engine can enter closed-loop control sooner after a cold start
• Designed to meet ACDelco's standards for fit, form, and function, with performance suited to the original application
• Sensing element built to hold up to exhaust heat, vibration, and contaminants
• Pre-installed connector and wiring pigtail on applicable designs for plug-and-play electrical connection
• Helps maintain proper emissions control system operation

ACDelco is General Motors' original equipment parts brand and is known for dependable replacement parts. Replacing a worn or failing oxygen sensor can help restore fuel economy, smooth out rough idle, and clear related check engine light codes. Select the correct part number for your application from the options listed on this page.