BMW P0427 Catalyst Temperature Sensor Low Input Bank 1 Sensor 1

Description OBD-II Trouble Code Description for P0427 BMW Catalyst Temperature Sensor Low What does this mean? OBD2 Code P0427 BMW definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the most…

BMW P0428 Catalyst Temperature Sensor High Input Bank 1 Sensor 1

Description OBD-II Trouble Code Description for P0428 BMW Catalyst Temperature Sensor High What does this mean? OBD2 Code P0428 BMW definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the most…

BMW P0426 Catalyst Temperature Sensor Range/Performance Bank 1 Sensor 1

Description OBD-II Trouble Code Description for P0426 BMW Catalyst Temperature Sensor Range/Performance What does this mean? OBD2 Code P0426 BMW definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the most…

BMW P0424 Heated Catalyst Temperature Below Threshold Bank 1

Description OBD-II Trouble Code Description for P0424 BMW Heated Catalyst Temperature Below Threshold What does this mean? OBD2 Code P0424 BMW definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the…

BMW P0425 Catalyst Temperature Sensor Circuit Bank 1 Sensor 1

Description OBD-II Trouble Code Description for P0425 BMW Catalyst Temperature Sensor What does this mean? OBD2 Code P0425 BMW definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the most important…

BMW P0423 Heated Catalyst Efficiency Below Threshold Bank 1

Description OBD-II Trouble Code Description for P0423 BMW Heated Catalyst Efficiency Below Threshold What does this mean? OBD2 Code P0423 BMW definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the…

BMW P0421 Warm Up Catalyst Efficiency Below Threshold Bank 1

Description OBD-II Trouble Code Description for P0422 BMW Main Catalyst Efficiency Below Threshold What does this mean? OBD2 Code P0422 BMW definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the…

BMW P0419 Secondary Air Injection System Relay B Circuit Malfunction

Description OBD-II Trouble Code Description for P0420 BMW Catalyst System Efficiency Below Threshold What does this mean? OBD2 Code P0420 BMW definition: The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream…

BMW P0420 Catalyst System Efficiency Below Threshold Bank 1

Description OBD-II Trouble Code Description for P0421 BMW Warm Up Catalyst Efficiency Below Threshold What does this mean? OBD2 Code P0421 BMW definition: Basically this means that the oxygen sensor downstream of the catalytic converter on bank 1 is detecting that the converter is not working as efficiently as it should be (according to specs)….

BMW P0417 Secondary Air Injection System Switching Valve B Circuit Shorted

Description OBD-II Trouble Code Description for P0418 BMW Secondary Air Injection System Control “A” Circuit What does this mean? OBD2 Code P0418 BMW definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one…