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OBDII Error Codes
DTC Codes and Troubleshooting.
63 Cummins articles in this category
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P0112 - Intake Air Temperature Sensor 1 Circuit Theory of Operation The Intake Manifold Temperature (IMT) Sensor is located on the intake manifold on the Regular Cab. For the Cab and Chassis, it is a part of the Temperature/Pressure MAP Sensor. The IMT Sensor is used to measure the temperature of the air in the intake manifold. The Powertrain Control Module (PCM) supplies 5-Volts to the intake manifold temperature signal circuit. The PCM monitors the change in voltage caused by changes
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P0113 - Intake Air Temperature Sensor 1 Circuit High Theory of Operation The Intake Manifold Temperature (IMT) Sensor is located on the intake manifold on the Regular Cab. For the Cab and Chassis, it is a part of the Temperature/Pressure MAP Sensor. The IMT Sensor is used to measure the temperature of the air in the intake manifold. The Powertrain Control Module (PCM) supplies 5-Volts to the intake manifold temperature signal circuit. The PCM monitors the change in voltage caused by ch
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P0116 - Engine Coolant Temperature Sensor Performance Theory of Operation The Engine Coolant Temperature Sensor (ECT) is located near the thermostat housing and is used to measure the engine coolant temperature. The Engine Coolant Temperature Sensor receives 5-Volts and a sensor ground from the PCM. The PCM monitors the change in voltage to determine the coolant temperature. There are two parts to this fault code, a key on check and a rationality check. After an eight hour cold soak, a
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P0117 - Engine Coolant Temperature Sensor Circuit Low Theory of Operation The Engine Coolant Temperature Sensor (ECT) is located near the thermostat housing and is used to measure the engine coolant temperature. The Engine Coolant Temperature Sensor receives 5-Volts and a sensor ground from the PCM. The PCM monitors the change in voltage to determine the coolant temperature. There are two parts to this fault code, a key on check and a rationality check. After an eight hour cold soak, a
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P0118 - Engine Coolant Temperature Sensor 1 Circuit High Theory of Operation The Engine Coolant Temperature Sensor (ECT) is located near the thermostat housing and is used to measure the engine coolant temperature. The Engine Coolant Temperature Sensor receives 5-Volts and a sensor ground from the PCM. The PCM monitors the change in voltage to determine the coolant temperature. There are two parts to this fault code, a key on check and a rationality check. After an eight hour cold soak
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P0128-THERMOSTAT RATIONALITY Theory of Operation The thermostat rationality diagnostic runs during a drive cycle that starts with the coolant temperature below 140°F. This diagnostic looks at the how cold the system is at start up, what the inlet air temperature is, and the amount of fuel burned during that drive cycle. The PCM estimates what the coolant temperature should be. If the coolant temperature is not above a calibrated threshold, the rationality fails. The PCM assumes that th
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P0169 - Water In Fuel Detected For Too Long Theory of Operation There are two Water-In-Fuel (WIF) sensors attached to the two fuel filters. WIF 1 is attached to the fuel filter mounted on the engine. WIF 2 is attached to a 2nd fuel filter that can now be found mounted to the chassis. The Powertrain Control Module (PCM) provides a 5-Volt reference signal to each WIF sensor. When the water collected in the respective fuel filter covers the sensor probes, the sensor then pulls the 5-Volt
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P0191 - Fuel Pressure Sensor Circuit Performance Theory of Operation This DTC is mapped to an idle diagnostic, and runs only at idle. The key-on error monitors fuel pressure voltage at key on after an eight hour cold soak. The Powertrain Control Module (PCM) varies fuel pressure and monitors the final fueling and engine speed to determine if the rate of change of fueling with respect to rate of change of pressure is with in the normal operation limits of the pressure sensor. The
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P0192 Fuel Pressure Sensor Low Theory of Operation The Powertrain Control Module (PCM) provides the Fuel Rail Pressure Sensor with a 5-Volt supply and sensor ground, and receives a signal voltage back from the Fuel Rail Pressure Sensor. This sensor signal voltage changes based on the pressure in the fuel rail. The PCM will light the MIL lamp immediately after the diagnostic runs and fails. During this time the customer may experience a power and or speed derate. The PCM will turn off t
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P0193 Fuel Pressure Sensor High Theory of Operation The Powertrain Control Module (PCM) provides the Fuel Rail Pressure Sensor with a 5-Volt supply and sensor ground, and receives a signal voltage back from the Fuel Rail Pressure Sensor. This sensor signal voltage changes based on the pressure in the fuel rail. The PCM will light the MIL lamp immediately after the diagnostic runs and fails. During this time the customer may experience a power and or speed derate. The PCM will turn off
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P0201 - Fuel Injector 1 Circuit / Open Theory of Operation The Powertrain Control Module (PCM) actuates the solenoid in the Fuel Injector causing the needle valve to rise and fuel flows through the spray holes in the nozzle tip into the combustion chamber. The PCM has a common internal driver circuit to all three Fuel Injectors on each bank. If any injector circuit on a given bank has a short to ground or a short to voltage, a DTC will be set for all three Fuel Injectors on that bank.
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P0202 - Fuel Injector 2 Circuit / Open Theory of Operation The Powertrain Control Module (PCM) actuates the solenoid in the Fuel Injector causing the needle valve to rise and fuel flows through the spray holes in the nozzle tip into the combustion chamber. The PCM has a common internal driver circuit to all three Fuel Injectors on each bank. If any injector circuit on a given bank has a short to ground or a short to voltage, a DTC will be set for all three Fuel Injectors on that bank.
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P0203 - Fuel Injector 3 Circuit / Open Theory of Operation The Powertrain Control Module (PCM) actuates the solenoid in the Fuel Injector causing the needle valve to rise and fuel flows through the spray holes in the nozzle tip into the combustion chamber. The PCM has a common internal driver circuit to all three Fuel Injectors on each bank. If any injector circuit on a given bank has a short to ground or a short to voltage, a DTC will be set for all three Fuel Injectors on that bank.
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P0204 - Fuel Injector 4 Circuit / Open Theory of Operation The Powertrain Control Module (PCM) actuates the solenoid in the Fuel Injector causing the needle valve to rise and fuel flows through the spray holes in the nozzle tip into the combustion chamber. The PCM has a common internal driver circuit to all three Fuel Injectors on each bank. If any injector circuit on a given bank has a short to ground or a short to voltage, a DTC will be set for all three Fuel Injectors on that bank.
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P0205 - Fuel Injector 5 Circuit / Open Theory of Operation The Powertrain Control Module (PCM) actuates the solenoid in the Fuel Injector causing the needle valve to rise and fuel flows through the spray holes in the nozzle tip into the combustion chamber. The PCM has a common internal driver circuit to all three Fuel Injectors on each bank. If any injector circuit on a given bank has a short to ground or a short to voltage, a DTC will be set for all three Fuel Injectors on that bank.
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P0206 - Fuel Injector 6 Circuit / Open Theory of Operation The Powertrain Control Module (PCM) actuates the solenoid in the Fuel Injector causing the needle valve to rise and fuel flows through the spray holes in the nozzle tip into the combustion chamber. The PCM has a common internal driver circuit to all three Fuel Injectors on each bank. If any injector circuit on a given bank has a short to ground or a short to voltage, a DTC will be set for all three Fuel Injectors on that bank.
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P0217 - Coolant Temperature Too High Theory of Operation The Coolant Temperature Sensor is a variable resistor sensor and is used to measure the temperature of the coolant of the engine. The PCM supplies 5-Volts to the Engine Coolant Temperature Sensor (ECT) Signal circuit. The PCM monitors the change in voltage caused by changes in the resistance of the sensor to determine the coolant temperature. The engine coolant temperature value is used by the PCM for the engine protection system
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P0218 - Transmission High Temperature Operation Activated Theory of Operation The DTC is intended as an informational DTC to aid the technician in determining the root cause of a customer dirveability issue. The DTC is also intended to alert the technician to determine if a cooling system malfunction has occurred or if an additional transmission air to oil cooler is needed to support the customers driving behavior. When Monitored and Set Conditions When Monitored: • This
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P0219-ENGINE OVERSPEED Theory of Operation The Crankshaft Position (CKP) and Camshaft Position (CMP) Sensors are hall effect type sensors. The Powertrain Control Module (PCM) provides a 5-Volt supply to the position sensor and return circuit. A notch on the crankshaft gear is used to determine the speed of the engine by the PCM. As the notch on the crankshaft speed ring or the windows in the back of the camshaft gear move past the position sensor, a signal is generated on the position
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P02E1 - Diesel Intake Air Flow Control Performance Theory of Operation The Exhaust Gas Recirculation (EGR) Airflow Control Valve is controlled by the Powertrain Control Module (PCM) and is actuated by an electric motor. A spring internal to the actuator assembly attempts to drive the valve to the fully-open position. The electric motor works to overcome the spring force when the engine control module commands the valve to close. Position feedback from the valve is sent to the PCM to al
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P02E2- Diesel Intake Air Flow Control Circuit Low Theory of Operation The Exhaust Gas Recirculation (EGR) Airflow Control Valve is controlled by the Powertrain Control Module (PCM) and is actuated by an electric motor. A spring internal to the actuator assembly attempts to drive the valve to the fully-open position. The electric motor works to overcome the spring force when the engine control module commands the valve to close. Position feedback from the valve is sent to the PCM to all
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P02E3 - Diesel Intake Air Flow Control Circuit High Theory of Operation The Exhaust Gas Recirculation (EGR) Airflow Control Valve is controlled by the Powertrain Control Module (PCM) and is actuated by an electric motor. A spring internal to the actuator assembly attempts to drive the valve to the fully-open position. The electric motor works to overcome the spring force when the engine control module commands the valve to close. Position feedback from the valve is sent to the PCM to a
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P02E7 - Diesel Intake Air Flow Position Sensor Performance h2> Theory of Operation The Exhaust Gas Recirculation (EGR) Airflow Control Valve is controlled by the Powertrain Control Module (PCM) and is actuated by an electric motor. A spring internal to the actuator assembly attempts to drive the valve to the fully-open position. The electric motor works to overcome the spring force when the engine control module commands the valve to close. Position feedback from the valve is sent t
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P02E8 - Diesel Intake Air Flow Position Sensor Circuit Low Theory of Operation The Exhaust Gas Recirculation (EGR) Airflow Control Valve is controlled by the Powertrain Control Module (PCM) and is actuated by an electric motor. A spring internal to the actuator assembly attempts to drive the valve to the fully-open position. The electric motor works to overcome the spring force when the engine control module commands the valve to close. Position feedback from the valve is sent to the P
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P02E9 - Diesel Intake Air Flow Position Sensor Circuit High Theory of Operation The Exhaust Gas Recirculation (EGR) Airflow Control Valve is controlled by the Powertrain Control Module (PCM) and is actuated by an electric motor. A spring internal to the actuator assembly attempts to drive the valve to the fully-open position. The electric motor works to overcome the spring force when the engine control module commands the valve to close. Position feedback from the valve is sent to the
