Category: BMW

P0434 BMW Heated Catalyst Temperature Below Threshold Bank 2 Possible causes – Air leak before catalytic converter– Faulty oxygen sensor– Faulty Catalytic Converter Tech description As the code description implies the P0434 BMW code means that the vehicle’s control module has detected that the three-way catalytic converter is not working properly (is not as efficient…

P0435 BMW Catalyst Temperature Sensor Circuit Bank 2 Sensor 1 Possible causes – Catalyst Temperature Sensor harness is open or shorted– Catalyst Temperature Sensor circuit poor electrical connection– Faulty Catalyst Temperature Sensor Tech description As the code description implies the P0435 BMW code means that the vehicle’s control module has detected that the three-way catalytic…

P0436 BMW Catalyst Temperature Sensor Range/Performance Bank 2 Sensor 1 Possible causes – Catalyst Temperature Sensor harness is open or shorted– Catalyst Temperature Sensor circuit poor electrical connection– Faulty Catalyst Temperature Sensor Tech description As the code description implies the P0436 BMW code means that the vehicle’s control module has detected that the three-way catalytic…

P0430 BMW Catalyst System Efficiency Below Threshold Bank 2 Possible causes – Three way catalyst converter Bank 2– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Engine Control Module (ECM) Tech description As the code description implies the P0430 BMW code means…

P0431 BMW Warm Up Catalyst Efficiency Below Threshold Bank 2 Possible causes – Warm Up Three Way Catalytic converter deterioration or malfunction– Exhaust system leaks– Loose front or rear HO2Ss– Faulty front heater O2 sensor– O2 sensors harness is open or shorted– O2 sensors poor electrical connection Tech description As the code description implies the…

P0432 BMW Main Catalyst Efficiency Below Threshold Bank 2 Possible causes – Warm Up Three Way Catalytic converter deterioration or malfunction– Exhaust system leaks– Loose front or rear HO2Ss– Faulty front heater O2 sensor– O2 sensors harness is open or shorted– O2 sensors poor electrical connection Tech description As the code description implies the P0432…

P0428 BMW Catalyst Temperature Sensor High Input Bank 1 Sensor 1 Possible causes – Faulty Catalyst Temperature Sensor– Catalyst Temperature Sensor harness is open or shorted– Catalyst Temperature Sensor circuit poor electrical connection Tech description As the code description implies the P0428 BMW code means that the vehicle’s control module has detected that the three-way…

P0429 BMW Catalyst Heater Control Circuit Bank 1 Possible causes – Faulty Catalyst Temperature Sensor– Catalyst Temperature Sensor harness is open or shorted– Catalyst Temperature Sensor circuit poor electrical connection Tech description As the code description implies the P0429 BMW code means that the vehicle’s control module has detected that the three-way catalytic converter is…

P0426 BMW Catalyst Temperature Sensor Range/Performance Bank 1 Sensor 1 Possible causes – Faulty Catalyst Temperature Sensor– Catalyst Temperature Sensor harness is open or shorted– Catalyst Temperature Sensor circuit poor electrical connection Tech description As the code description implies the P0426 BMW code means that the vehicle’s control module has detected that the three-way catalytic…

P0427 BMW Catalyst Temperature Sensor Low Input Bank 1 Sensor 1 Possible causes – Faulty Catalyst Temperature Sensor– Catalyst Temperature Sensor harness is open or shorted– Catalyst Temperature Sensor circuit poor electrical connection Tech description As the code description implies the P0427 BMW code means that the vehicle’s control module has detected that the three-way…

P0424 BMW Heated Catalyst Temperature Below Threshold Bank 1 Possible causes – Air leak before catalytic converter – Faulty oxygen sensor– Faulty Catalytic Converter Tech description As the code description implies the P0424 BMW code means that the vehicle’s control module has detected that the three-way catalytic converter is not working properly (is not as…

P0425 BMW Catalyst Temperature Sensor Circuit Bank 1 Sensor 1 Possible causes – Faulty Catalyst Temperature Sensor– Catalyst Temperature Sensor harness is open or shorted– Catalyst Temperature Sensor circuit poor electrical connection Tech description As the code description implies the P0425 BMW code means that the vehicle’s control module has detected that the three-way catalytic…

P0420 BMW Catalyst System Efficiency Below Threshold Bank 1 Possible causes – Three way catalyst converter Bank 1– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Engine Control Module (ECM) Tech description As the code description implies the P0421 BMW code means…

P0421 BMW Warm Up Catalyst Efficiency Below Threshold Bank 1 Possible causes – Warm Up Three Way Catalytic converter deterioration or malfunction– Exhaust system leaks– Loose front or rear HO2Ss– Faulty front heater O2 sensor– O2 sensors harness is open or shorted– O2 sensors poor electrical connection Tech description As the code description implies the…

P0423 BMW Heated Catalyst Efficiency Below Threshold Bank 1 Possible causes – Air leak before catalytic converter – Faulty oxygen sensor– Faulty Catalytic Converter Tech description As the code description implies the P0423 BMW code means that the vehicle’s control module has detected that the three-way catalytic converter is not working properly (is not as…