Possible causes – Faulty nitrogen oxides (NOx) sensor– Nitrogen oxides (NOx) sensor harness is open or shorted– Nitrogen oxides (NOx) sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1033 VOLKSWAGEN OBD Code Description Nitrogen oxides (NOx) sensor – signal too low
Tag: VOLKSWAGEN
P1034 VOLKSWAGEN Nitrogen Oxides Sensor Signal Outside Tolerance
Possible causes – Faulty nitrogen oxides (NOx) sensor– Nitrogen oxides (NOx) sensor harness is open or shorted– Nitrogen oxides (NOx) sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1034 VOLKSWAGEN OBD Code Description Nitrogen oxides (NOx) sensor – signal outside tolerance
P1128 VOLKSWAGEN Long Term Fuel Trim B1 System Too Lean
Possible causes – Faulty Mass Air Flow (MAF) sensor– Low fuel pressure– Vacuum leak on engine– Faulty HO2S bank 1 Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P1141 VOLKSWAGEN Load Calculation Cross Check Range/Performance
Possible causes – Faulty Mass Air Flow (MAF) Sensor– Mass Air Flow Sensor harness is open or shorted– Mass Air Flow Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P1145 VOLKSWAGEN Mass Air Flow Sensor Short To Positive
Possible causes – Faulty Mass Air Flow (MAF) Sensor– Mass Air Flow Sensor harness is open or shorted– Mass Air Flow Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P1146 VOLKSWAGEN Mass Air Flow Sensor Supply Voltage
Possible causes – Faulty Mass Air Flow (MAF) Sensor– Mass Air Flow Sensor harness is open or shorted– Mass Air Flow Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P1142 VOLKSWAGEN Load Calculation Cross Check Lower Limit Exceeded
Possible causes – Faulty Mass Air Flow (MAF) Sensor– Mass Air Flow Sensor harness is open or shorted– Mass Air Flow Sensor circuit poor electrical connection– Check for vacuum leaks Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P1143 VOLKSWAGEN Load Calculation Cross Check Upper Limit Exceeded
Possible causes – Faulty Mass Air Flow (MAF) Sensor– Vacuum leaks– Throttle system errors Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P1144 VOLKSWAGEN Mass Air Flow Sensor Open/Short To Ground
Possible causes – Faulty Mass Air Flow (MAF) Sensor– Vacuum leaks– Throttle system errors Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P0100 VOLKSWAGEN Mass Air Flow or Volume Air Flow Sensor Circuit
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…