Category: Buick

P0437 Buick Catalyst Temperature Sensor Low Input 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 P0437 Buick code means that the vehicle’s control module has detected that the three-way…

P0431 Buick 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 Buick 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…

P042A Buick Catalyst Temperature Sensor Circuit (Bank 1 – Sensor 2) OBD Code: System: Subsystem:  P042A Buick – (ASE)  Powertrain  Auxiliary Emission Controls Trouble Code Description: Catalyst Temperature Sensor Circuit (Bank 1 – Sensor 2) Location: Analysis: Possible Causes:  Bank 1 – Sensor 2  Circuit Issue   Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera –…

P0428 Buick 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 Buick code means that the vehicle’s control module has detected that the three-way…

P0429 Buick 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 Buick code means that the vehicle’s control module has detected that the three-way catalytic converter is…

P0423 Buick 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 Buick code means that the vehicle’s control module has detected that the three-way catalytic converter is not working properly (is not as…

P0424 Buick 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 Buick code means that the vehicle’s control module has detected that the three-way catalytic converter is not working properly (is not as…

P0425 Buick 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 Buick code means that the vehicle’s control module has detected that the three-way catalytic…

P0426 Buick 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 Buick code means that the vehicle’s control module has detected that the three-way catalytic…

P0427 Buick 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 Buick code means that the vehicle’s control module has detected that the three-way…

P0421 Buick 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…