SEN AY-A/F RATIO

Enhanced Fuel Efficiency & Emission Control with the Precision Sensor

The Sensor AY-A/F Ratio is an integral component of Subaru vehicles, ensuring optimal air-fuel mixture for the engine. This sensor is essential for maintaining efficient engine performance, reducing emissions, and improving fuel economy. It continuously monitors the ratio of air to fuel in the engine's combustion chamber, sending precise information to the engine control unit (ECU).

Functionality & Importance

Precisely positioned in the exhaust system, the sensor detects oxygen levels, allowing the ECU to adjust fuel injection accordingly. A perfect balance ensures that the engine runs efficiently, minimizes harmful emissions, and prevents potential engine damage. Essentially, it acts as the vehicle's "breathalyzer," ensuring the engine breathes just the right mixture of air and fuel.

Consequences of Sensor Malfunction

If this sensor fails or malfunctions, the vehicle's fuel efficiency decreases significantly. An incorrect air-fuel mixture can lead to increased emissions, potential damage to the catalytic converter, stalling, or a noticeable decline in overall engine performance. The vehicle's Check Engine Light may illuminate, indicating the need for immediate attention.

• Legacy