Lambda Sensor Replacement Glasgow

Lambda sensors — also called oxygen sensors or O2 sensors — measure the amount of oxygen in your exhaust gases. This information is used by the ECU to adjust the air-fuel mixture for optimal combustion. Most vehicles have at least two lambda sensors: one before the catalytic converter (upstream) and one after (downstream).

When a lambda sensor fails or becomes sluggish, the ECU can't properly control the air-fuel mixture. This leads to poor fuel economy, increased emissions, rough running, and often an engine management light. A faulty lambda sensor is also one of the most common reasons for failing the MOT emissions test.

At Doyen Auto Services in Rutherglen, we diagnose lambda sensor issues using professional equipment that shows us the sensor's response time and output — not just whether there's a fault code. This means we can identify sensors that are technically still working but performing poorly, which a basic code reader would miss.