P1130 BMW Oxygen Sensor Behind Catalytic Converter Ageing

Possible causes – Faulty Oxygen Sensor– Oxygen Sensor harness is open or shorted– Oxygen Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1130 BMW OBD Code Description O2 sensor circuit dynamic test bank 1 sensor 2

P0328 BMW Knock sensor 1 Circuit High Input

Possible causes – Faulty knock sensor– Knock sensor circuit poor electrical connection– Knock sensor harness is open or shorted– Faulty Engine Control Module (ECM) Tech description The P0328 code means that the Knock Sensor is not working properly. Problems with the knock sensor will not cause an engine performance problems. Replacing the knock sensor usually…

P0691 BMW Electric Fan Activation

Possible causes – Faulty Low Speed Radiator Fan Relay– Low Speed Radiator Fan Relay harness is open or shorted– Low Speed Radiator Fan Relay circuit poor electrical connection– Faulty Electric Fan– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Radiator fan inoperative– Possible engine overheating P0691 BMW…

P0100 BMW Mass Air Sensor Signal

Possible causes – Faulty mass air flow sensor– Intake air leaks– Dirty mass air flow sensor– Dirty mass air filter– Mass air flow sensor harness is open or shorted– Mass air flow sensor circuit poor electrical connection Tech description Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air…