J.C. Whitney Heated Oxygen Sensor 4-Wire Upstream

The J.C. Whitney Heated Oxygen Sensor (also called an O2 sensor or lambda sensor) is a 4-wire upstream design. It monitors the oxygen content in the exhaust stream ahead of the catalytic converter. It sends that data to the engine control module so the module can adjust the air-fuel mixture.

Key Features:

• Upstream placement for air-fuel ratio feedback to the engine computer
• 4-wire heated design with an internal heating element that brings the sensor to operating temperature quickly
• OEM replacement design for direct installation with the factory connector
• Helps support proper fuel economy, smooth engine operation and emissions control

A worn or failing oxygen sensor can cause poor fuel economy, rough idle, hesitation and a check engine light. Replacing it restores accurate exhaust feedback and helps the engine run efficiently. This product line includes multiple part numbers, so choose the one that matches your application.