Importance of Air Fuel Ratio Sensors ?

An air fuel ratio sensor plays a critical role in optimizing your vehicle's performance and fuel efficiency. Positioned strategically in the exhaust stream, it measures the proportion of air to fuel entering the engine. This allows the engine control unit (ECU) to adjust the fuel injection and ignition timing, promoting efficient combustion and reducing harmful emissions.

How the Sensor Works ⚙️

The air fuel ratio sensor utilizes a sophisticated electro-chemical process to assess the amount of oxygen in the exhaust gases. By comparing the oxygen level to the air outside, it determines whether the engine is running too rich (excess fuel) or too lean (excess air). The ECU processes this data, making real-time adjustments to maintain the optimal stoichiometric balance essential for peak engine performance and environmental compliance.

Consequences of a Faulty Sensor ?

If the air fuel ratio sensor fails, the ramifications can be significant. A broken sensor may lead to poor fuel economy, increased emissions, and reduced engine power. Unresolved, it can even cause damage to the catalytic converter, a costly repair. Symptoms include rough idling, hesitation, and the illumination of the check engine light.

• Highlander
• Highlander/Kluger