ACDelco Oxygen Sensor Sensor

The ACDelco oxygen sensor (also called an O2 sensor, air/fuel ratio sensor or lambda sensor) monitors the oxygen content in the exhaust stream and sends a signal to the engine control module. The module uses that signal to fine-tune the air-fuel mixture for efficient combustion, good fuel economy and controlled emissions.

Key Features:

• Designed to meet or exceed OE performance requirements, with accurate and fast signal response
• Precision-engineered sensing element for reliable readings across a wide range of operating temperatures
• Built-in heater circuit on heated designs for quick warm-up and closed-loop operation
• Durable housing and wiring built to withstand heat, vibration, moisture and road contaminants
• Connector and harness designed for a secure, plug-in fit
• Available in upstream and downstream positions across multiple applications

A worn or contaminated oxygen sensor can cause poor fuel economy, rough idle, increased emissions and a check engine light. Replacing it with an ACDelco sensor helps restore proper engine management feedback and emissions performance. ACDelco is General Motors' official parts brand and is known for its OE-quality engineering and broad parts coverage. Select the child item for your specific part number.