O2 Oxygen Sensor Upstream For 2004 2005 2006 Cadillac CTS STS SRX XLR 3.6L 4.6L

O2 Oxygen Sensor Upstream for Cadillac

This upstream O2 oxygen sensor for Cadillac measures exhaust gas oxygen levels to assist the engine control module in optimizing the air-fuel ratio.

Overview

This O2 oxygen sensor upstream is a vital emissions control component located before the catalytic converter. The O2 oxygen sensor upstream helps maintain efficient fuel consumption and minimizes tailpipe emissions. It is intended for technicians and vehicle owners replacing fouled or slow-responding sensors to resolve rough idling issues.

Built For Performance

• Constructed with dual protective layers to prevent sensor contamination.
• Includes pre-applied anti-seize compound on the threads for easy installation.
• Features rapid-response heating elements to reach operating temperature quickly.
• Engineered with precise connection terminals to resist moisture corrosion.

Fits These Machines

• for Cadillac CTS 3.6L 4.6L 2004-2006
• for Cadillac STS 3.6L 4.6L 2004-2006
• for Cadillac SRX 3.6L 4.6L 2004-2006
• for Cadillac XLR 4.6L 2004-2006

On-The-Job Use

• Replacing failed upstream sensors that cause rich or lean running conditions.
• Restoring fuel economy performance by correcting the air-fuel feedback loop.
• Clearing diagnostic trouble codes related to oxygen sensor heater circuits.

Specs At A Glance

Good To Know

Q: What is the difference between an upstream and downstream oxygen sensor? A: The upstream sensor is located before the catalytic converter to monitor fuel mixture, while the downstream sensor monitors converter efficiency.

Q: Does this sensor require special tools for installation? A: A dedicated oxygen sensor socket is highly recommended to prevent damage to the wire harness during removal and installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.