Heated Oxygen Sensor, Rear: Essential for Optimal Performance

The heated oxygen sensor, a critical component of your vehicle's emission control system, plays a pivotal role in maintaining fuel efficiency and reducing harmful emissions. Positioned strategically in the exhaust stream, this electronic sensor measures the oxygen levels in the exhaust gases, providing vital data to the engine control unit (ECU).

Why the Heated Oxygen Sensor is Needed

This sensor is essential for fine-tuning the air-fuel mixture entering your engine. Accurate readings allow the ECU to adjust the fuel injection, ensuring optimal combustion and efficiency. This balance supports both engine performance and environmental sustainability by limiting pollutants.

How the Sensor Works

Once the engine reaches operating temperature, the sensor's built-in heater element quickly gets it up to optimum temperature for accurate measurement. It analyzes the oxygen content in the exhaust, comparing it to the outside air, and sends real-time voltage signals to the ECU, which adjusts fuel delivery accordingly.

Risks of a Malfunctioning Sensor

If the heated oxygen sensor fails, your car's computer system may receive inaccurate information, resulting in poor fuel economy, increased emissions, and potential damage to the catalytic converter. Symptoms such as rough idling, sluggish acceleration, and a lit check engine light may become evident.

Compatible Car Models

• Q70/M
• QX50/EX
• Q60/G Coupe
• Q50
• QX70/FX
• Q60/G Convertible
• Q70 (201802-)LAM
• Q40/G Sedan