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OBDII Error Codes
DTC Codes and Troubleshooting.
63 Cummins articles in this category
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P04DB - Crankcase Ventilation System Disconnected When Monitored: Engine at operating temperature, driving at a steady speed. This monitor takes 10 minutes to completely run. Set Condition: Crankcase Pressure readings have been significantly elevated, as compared to historic trends saved in the Powertrain Control Module. Possible Causes DISCONNECTED CRANKCASE VENTILATION HOSE INTAKE SYSTEM LEAK CRANKCASE BREATHER FILTER CLOGGED Always perform the Pre-Diagnosti
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P04E2 - Crankcase Ventilation Hose Connection Sensor Circuit Low When Monitored: Ignition on and battery voltage above 10.4 Volts. Set Condition: The Crankcase Hose Pressure Signal sent to the Powertrain Control Module is below a calibrated threshhold. The Powertrain Control Module (PCM) will illuminate the Malfunction Indicator Lamp (MIL) after the diagnostic runs and fails in two consecutive drive cycles. Possible Causes CRANKCASE HOSE PRESSURE SIGNAL CIRCUIT SHOR
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P04E3 - Crankcase Ventilation Hose Connection Sensor Circuit High When Monitored: Ignition on and battery voltage above 10.4 Volts. Set Condition: The Crankcase Hose Pressure Signal being sent to the Powertrain Control Module is above a calibrated threshhold. The Powertrain Control Module (PCM) will illuminate the Malfunction Indicator Lamp (MIL) after the diagnostic runs and fails in two consecutive drive cycles. Possible Causes CRANKCASE HOSE PRESSURE SIGNA
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P04E4 - Crankcase Ventilation Hose Connection Sensor Circuit Intermittent/Erratic When Monitored: Ignition on and battery voltage above 10.4 Volts. Set Condition: At key on, engine not running the Crankcase Hose Pressure Sensor Signal being sent to the Powertrain Control Module is higher or lower than a calibrated threshold. Or, during engine operation, the Crankcase Pressure Hose Sensor Signal is not changing with engine operating conditions. Possible Causes CRANKC
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P06A4 - Sensor Reference Voltage 4 Circuit Low Theory of Operation This sensor supply circuit provides a 5-Volt supply to the Accelerator Pedal Position 1 Sensor (APPS) and the A/C Pressure Sensor. The Powertrain Control Module (PCM) illuminates the MIL lamp immediately after the diagnostic runs and fails. The ETC lamp will also flash. During this time the customer will be in a limp home mode. The PCM will turn off the MIL lamp after the diagnostic runs and passes in four consecutive d
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P06A5 - Sensor Reference Voltage 4 Circuit High Theory of Operation This sensor supply circuit provides a 5-Volt supply to the Accelerator Pedal Position 1 Sensor (APPS) and the A/C Pressure Sensor. The Powertrain Control Module (PCM) illuminates the MIL lamp immediately after the diagnostic runs and fails. The ETC lamp will also flash. During this time the customer will be in a limp home mode. The PCM will turn off the MIL lamp after the diagnostic runs and passes in four consecutive
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P06D3 - Sensor Reference Voltage 5 Circuit Low Theory of Operation This sensor supply circuit provides a 5-Volt supply to the Accelerator Pedal Position 2 Sensor (APPS), Diesel Particulate Filter Pressure Sensor, Soot Delta Pressure Sensor, and the Transmission Pressure Sensor. The Powertrain Control Module (PCM) illuminates the MIL lamp immediately after the diagnostic runs and fails. The ETC lamp will also flash. During this time the customer will be in a limp home mode. The PCM will
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P06D4 - Sensor Reference Voltage 5 Circuit High Theory of Operation This sensor supply circuit provides a 5-Volt supply to the Accelerator Pedal Position 2 Sensor (APPS), Diesel Particulate Filter Pressure Sensor, Soot Delta Pressure Sensor, and the Transmission Pressure Sensor. The Powertrain Control Module (PCM) illuminates the MIL lamp immediately after the diagnostic runs and fails. The ETC lamp will also flash. During this time the customer will be in a limp home mode. The PCM wil
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P06D7 - Sensor Reference Voltage 6 Circuit Low Theory of Operation This sensor supply circuit provides a 5-Volt supply to the Fuel Rail Pressure (FRP) Sensor. The Powertrain Control Module (PCM) illuminates the MIL lamp immediately after the diagnostic runs and fails. The ETC lamp will also flash. During this time the customer will be in a limp home mode. The PCM will turn off the MIL lamp after the diagnostic runs and passes in four consecutive drive cycles. When Monitored:
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P06D8 - Sensor Reference Voltage 6 Circuit High Theory of Operation This sensor supply circuit provides a 5-Volt supply to the Fuel Rail Pressure (FRP) Sensor. The Powertrain Control Module (PCM) illuminates the MIL lamp immediately after the diagnostic runs and fails. The ETC lamp will also flash. During this time the customer will be in a limp home mode. The PCM will turn off the MIL lamp after the diagnostic runs and passes in four consecutive drive cycles. When Monitored:
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P07BF - 00 - Input - Turbine Shaft Speed Sensor 1 Circuit Low For a complete TRANSMISSION wiring diagram, (refer to the Wiring Information) . Theory of Operation The purpose of the diagnostic is to check the turbine speed sensor circuit for electrical failures by continuously monitoring the sensor output circuit for voltage high, low, or open conditions. The turbine speed sensor is a Hall Effect sensor that has an output range that alternates between normal high and normal
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P07C0 - 00 - Input - Turbine Shaft Speed Sensor 1 Circuit High For a complete TRANSMISSION wiring diagram, (refer to the Wiring Information) . Theory of Operation The purpose of the diagnostic is to check the turbine speed sensor circuit for electrical failures by continuously monitoring the sensor output circuit for voltage high, low, or open conditions. The turbine speed sensor is a Hall Effect sensor that has an output range that alternates between normal high and normal low vo
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P20B7 - (Diesel Exhaust Fluid) Reductant Pump Heater Control Circuit Low Theory of Operation The Powertrain Control Module (PCM) controls the DEF Heaters via datalink communication with the Diesel Exhaust Fluid Dosing Control Unit (DEF DCU - sometimes referred to as the Selective Catalytic Reduction (SCR) Module). The DEF DCU receives two voltage supplies: One from the SCR Relay1 (which is activated upon startup). And, the other is a fused B+ supply. The DEF Tank electric heater and DE
