What is Oxygen (Lambda) Sensor?

The Oxygen Sensor, the exhaust manifold, does not come out of the engine in the exhaust. Monitoring oxygen levels in the exhaust is a way of measuring fuel mix. It says if the fuel mixture is rich (less oxygen) or oil-free (more oxygen).

Symptoms;

* Increases fuel consumption

* Low vehicle traction, low performance and speed

* Ripple at idle

Fault Codes;

P0030 HO2S Heater Control Circuit

P0031 HO2S Heater Control Circuit Low

P0032 HO2S Heater Control Circuit High

Upstream O2 was Bank to Bank

P0131 O2 Sensor Circuit Low Voltage