Subaru Oxygen Sensor: Vital for Engine Performance and Emissions Control

The oxygen sensor, a key component in a vehicle's exhaust system, plays a crucial role in monitoring and adjusting the air-fuel mixture reaching the engine. This delicate balance is essential for efficient fuel combustion, optimal engine performance, and minimizing harmful emissions. Without it, the engine control unit (ECU) would struggle to achieve the perfect fuel mixture, leading to various engine issues and increased pollutants.

Functionality of the Oxygen Sensor

This sensor continuously measures the amount of oxygen in the exhaust gases, sending vital data to the ECU. The information helps in adjusting the fuel injection system to maintain an ideal air-fuel ratio. By ensuring the combustion in the engine cylinders is as complete as possible, the sensor aids in maximizing fuel efficiency and keeping emissions within legal limits.

Consequences of a Malfunctioning Sensor

A broken or malfunctioning oxygen sensor can spell trouble for your vehicle. Symptoms may include poor fuel economy, higher emissions, rough engine idle, or even damage to the catalytic converter due to incorrect air-fuel mixtures. Ignoring such issues could lead to costly repairs and failing emissions tests.

Compatibility

• Legacy
• Forester
• Wrx/Levorg
• Wrx