Tag: AUDI

Possible causes – HO2S Bank 1 and 2 Sensor 1 harness is open or shorted– HO2S Bank 1 and 2 Sensor 1 circuit connectors (wrong connection)– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0040 AUDI OBD Code Description The heated oxygen sensor (HO2S) monitor determines if…

Possible causes – HO2S Bank 1 and 2 Sensor 2 harness is open or shorted– HO2S Bank 1 and 2 Sensor 2 circuit connectors (wrong connection)– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0041 AUDI OBD Code Description The heated oxygen sensor (HO2S) monitor determines if…

Possible causes – Intake air leak– Faulty O2 Sensor– Faulty Mass Air Flow (MAF) Sensor– O2 Sensor harness is open or shorted– O2 Sensor circuit poor electrical connection Tech description 2002 Volkswagen Passat User Submitted Video Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Intake air leak– Faulty O2 Sensor– Faulty Mass Air Flow (MAF) Sensor– O2 Sensor harness is open or shorted– O2 Sensor circuit poor electrical connection Tech description 2002 Volkswagen Passat User Submitted Video Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Intake air leaks– Faulty front heated oxygen sensor– Ignition misfiring– Faulty fuel injectors– Exhaust gas leaks– Incorrect fuel pressure– Lack of fuel– Faulty Mass Air Flow (MAF) sensor– Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech description Dirty air filter, air filter housing or Mass Air Flow (MAF) sensor, or faulty MAF…

Possible causes – Intake air leaks– Faulty front heated oxygen sensor– Ignition misfiring– Faulty fuel injectors– Exhaust gas leaks– Incorrect fuel pressure– Lack of fuel– Faulty Mass Air Flow (MAF) sensor– Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech description If the P0171 is combined with the P0174 code, it’s very likely that the problem…

Possible causes – Intake air leaks– Faulty front heated oxygen sensor– Ignition misfiring– Faulty fuel injectors– Exhaust gas leaks– Incorrect fuel pressure– Lack of fuel– Faulty Mass Air Flow (MAF) sensor– Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech description If the P0174 is combined with the P0171 code, it’s very likely that the problem…

Possible causes – Intake leak– Damaged AIR system components– Faulty AIR Solenoid Valve– Faulty AIR system relay Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Fuel metering solenoid harness is open or shorted – Fuel metering solenoid electrical circuit poor connection – Faulty fuel metering solenoid Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Faulty Vacuum Switching Valve (VSV)– Vacuum Switching Valve (VSV) harness is open or shorted– Vacuum Switching Valve (VSV) circuit poor electrical connection– Faulty Pressure Sensor– Faulty Air Switching Valve When is the obd code mean? If the Engine Control Module (ECM) receives the pulsation signal from the sensor despite the ECM ordering…