Your engine could have up to two oxygen sensors, depending on the make and model of your vehicle. Oxygen sensor are essential components of a vehicle’s emissions system. These sensors measure the amount of oxygen in exhaust gases. These sensors ...

Engine control modules (PCM/ECM/ECUs) rely on oxygen sensors for adjusting engine performance and controlling emission levels. The PCM will display fault code P0140 if the oxygen sensor downstream from the catalytic convert (Sensor 2). This is a weak or non-functioning ...

To operate efficiently, an engine must have the correct air-fuel ratio. The PCM/ECM (powertrain control module) decides how much fuel is injected into the engine. The sensors around the engine help it calculate the correct levels. The oxygen sensor (O2) ...

Oxygen sensors are used to measure the amount oxygen in exhaust gases. The Powertrain Control Module of your vehicle (PCM/ECM/ECU), calculates fuel control using the signal received from the oxygen sensor located upstream (sensor 1), which is located before the ...

The main computer of your vehicle (PCM/ECM/ECU), triggers the fault code P0137 if it detects an oxygen sensor voltage below the pre-programmed parameters by the manufacturer for a period of time. The code indicates an excess of oxygen in exhaust ...

A burning engine fault lamp, increased fuel consumption and an irregularly running motor can all indicate a number of problems. If you receive a P0132 error code on your OBD-II scan, this means that there is an oxygen sensor problem. ...

The heated oxygen sensor is more likely to be installed in a modern car than the standard oxygen sensor. The sensor can reach its operating temperature faster because of the heating element. The PCM will store the P0155 code in ...