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OBDII Error Codes
Everything pertaining to OBDII diagnostics and error code reading and troubleshooting.
109 Cummins articles in this category
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DTC P0112: INTAKE AIR TEMPERATURE SENSOR VOLTAGE TOO LOW Monitor & Set Conditions Intake Air Temperature (IAT) sensor voltage is monitored when the ignition is on and battery voltage is greater than 10.4 volts. DTC may be stored when IAT sensor voltage at ECM is less than .098 volt for greater than 2 seconds Possible Causes Intermittent Wiring
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DTC P0113: INTAKE AIR TEMPERATURE SENSOR VOLTAGE TOO HIGH Monitor & Set Conditions Intake Air Temperature (IAT) sensor voltage is monitored when the ignition is on and battery voltage is greater than 10.4 volts. DTC may be stored when IAT sensor voltage at ECM is greater than 4.97 volts for greater than 2 seconds. Possible Causes Intermittent Wiring Problem
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DTC P0117: ENGINE COOLANT TEMPERATURE SENSOR VOLTAGE TOO LOW Monitor & Set Conditions Engine Coolant Temperature (ECT) sensor voltage is monitored when the ignition is on and battery voltage is greater than 10.4 volts. DTC may be stored when ECT sensor voltage at Engine Control Module (ECM) is less than .8 volt for greater than 2 seconds. Possible Causes Intermitte
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DTC P0118: ENGINE COOLANT TEMPERATURE SENSOR VOLTAGE TOO HIGH Monitor & Set Conditions Engine Coolant Temperature (ECT) sensor voltage is monitored when the ignition is on and battery voltage is greater than 10.4 volts. DTC may be stored when ECT sensor voltage at Engine Control Module (ECM) is greater than 4.98 volts for greater than 2 seconds. Possible Causes Int
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DTC P0121: ACCEL POS SENSOR VOLTS DO NOT AGREE W/IDLE VALID SIGNAL Monitor & Set Conditions Accelerator Pedal Position Sensor (APPS) voltage is monitored with the throttle at less than 15 percent of full throttle for about one second or when the vehicle speed is greater than 10 MPH for about one second. DTC may be stored if the idle valid signal indicates an idle condition while APPS signal voltage does not indicate an idle condition or if the idle valid signal does not indic
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DTC P0122: APP SENSOR SIGNAL VOLTAGE TOO LOW Monitor & Set Conditions Accelerator Pedal Position Sensor (APPS) voltage is monitored when the engine is running. DTC may be stored if low voltage is detected on APPS signal circuit or low voltage is detected between Engine Control Module (ECM) and Powertrain Control Module (PCM). Possible Causes 5-volt Supply At APPS Shorted To ECM Sensor Ground APPS Signal Circuit Shorted To ECM Sensor Ground
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DTC P0123: APP SENSOR SIGNAL VOLTAGE TOO HIGH Monitor & Set Conditions Accelerator Pedal Position Sensor (APPS) voltage is monitored when the engine is running. DTC may be stored if a high voltage is detected on APPS signal circuit or high voltage is detected between Engine Control Module (ECM) and Powertrain Control Module (PCM). Possible Causes 5-volt Supply At APPS Shorted To Voltage (Engine Running) APPS 5-volt Supply Circuit Shorted To Voltage
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DTC P0125: COOLANT TEMP RATIONALITY Monitor & Set Conditions Engine Coolant Temperature (ECT) sensor voltage is monitored when the engine is running, engine coolant temperature is -40 to 150°F (-40 to 65°C) and no Intake Air Temperature (IAT), ECT or battery temperature DTCs are set. ECT sensor voltage is also monitored when the engine is off with ignition on. Intake Air Temperature (IAT) must be less than 80°F (26°C), battery voltage
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DTC P0128: ENGINE IS COLD TOO LONG Monitor & Set Conditions Engine Coolant Temperature (ECT) sensor voltage is monitored when the engine is running, engine coolant temperature is 20 to 130°F (-6 to 55°C) and no ECT or battery temperature DTCs are set. DTC will set if coolant temperature reading is less than 170°F (77°C) after the engine has been running for 10-32 minutes (depending on engine coolant temperature at engine
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DTC P0168: HIGH INJECTION PUMP FUEL TEMP Monitor & Set Conditions Engine performance is monitored with the engine running. DTC will set if fuel temperature sensor signal indicates fuel temperature has exceeded the engine protection and/or pump protection limit. Possible Causes Overflow Valve Fuel Injection Pump Module
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DTC P0177: WATER IN FUEL Monitor & Set Conditions Water-In-Fuel (WIF) sensor circuit is monitored with ignition on. DTC will set if WIF sensor indicates the water in the fuel filter needs to be drained. Possible Causes Water-In-Fuel (WIF) Sensor WIF Sensor Signal Circuit Short To Ground Testing &#
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DTC P0178: WATER IN FUEL TEMPERATURE SENSOR TOO LOW Monitor & Set Conditions Water-In-Fuel (WIF) sensor circuit is monitored with ignition on. DTC will set if low WIF signal circuit voltage is detected at Engine Control Module (ECM). Possible Causes Other DTC Present - P1488 Other DTC Present - P0562 WIF Sensor Sign
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DTC P0180: FUEL INJECTION PUMP TEMP OUT OF RANGE Monitor & Set Conditions Fuel injection pump temperature is monitored when the engine is running. DTC will set if fuel temperature is out of normal pump operating range. Possible Causes Injection Pump - Engine Running Injection Pump - Engine Off Testing &#
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DTC P0181: FUEL INJECTION PUMP FAILURE Monitor & Set Conditions Fuel injection pump operation is monitored with ignition on. DTC will set if a high or low voltage is detected at the fuel temperature sensor signal circuit inside the fuel injection pump controller. Possible Causes Injection Pump - Engine Running Injection Pump - Engine Off
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DTC P0215: FUEL INJECTION PUMP CONTROL CIRCUIT Monitor & Set Conditions Fuel injection pump operation is monitored with ignition on. DTC will set if no power is detected at the fuel injection pump controller with the ignition on. Possible Causes Fuel Injection Pump Relay Ground Circuit Open Fuel Injection Pump Relay
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DTC P0216: VP44 FUEL INJECTION PUMP TIMING FAILURE Monitor & Set Conditions Fuel injection pump operation is monitored with ignition on. DTC will set when the engine speed is greater than 300 RPM, fuel command 5 mm3/str and timing command within a certain window. Possible Causes Other DTCs Fuel Injection Pump Gear Alignment
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DTC P0217: DECREASED ENGINE PERFORMANCE DUE TO ENGINE OVERHEAT CONDITION Monitor & Set Conditions Decreased engine performance due to engine overheat condition is monitored with ignition on and engine running. DTC will set when coolant temperature signal indicates coolant temperature has exceeded the engine protection limit. Possible Causes ECT Sensor
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DTC P0219: CRANKSHAFT POSITION SENSOR OVERSPEED SIGNAL 1. Turn ignition on with engine off. Using scan tool, read engine RPM. If engine RPM is zero RPM with engine off, go to next step. If engine RPM is more than zero RPM with engine off, replace ECM. ECM is located on driver's side of engine, just in front of fuel transfer pump and contains a 50-pin connector. Perform TEST VER-2A . 2. Turn ignition off. Remove air intake hos
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DTC P0222: IDLE VALIDATION SIGNALS BOTH LOW Monitor & Set Conditions Idle validation signals are monitored when the ignition is on and the engine is running. DTC P0222 may be stored if Engine Control Module (ECM) senses no voltage signal or the same voltage from Idle Validation Switch (IVS) No. 1 and IVS No. 2. DTC P0223 may be stored if ECM senses the same voltage from IVS No. 1 and IVS No. 2.
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DTC P0223: IDLE VALIDATION SIGNALS BOTH HIGH Monitor & Set Conditions Idle validation signals are monitored when the ignition is on and the engine is running. DTC P0222 may be stored if Engine Control Module (ECM) senses no voltage signal or the same voltage from Idle Validation Switch (IVS) No. 1 and IVS No. 2. DTC P0223 may be stored if ECM senses the same voltage from IVS No. 1 and IVS No. 2.
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DTC P0230: TRANSFER PUMP CIRCUIT OUT OF RANGE 1. Turn ignition off. Disconnect fuel transfer pump connector. Fuel transfer pump is located at driver's side of the engine, just above the starter. See Fig. 37 . Using ohmmeter, check resistance between the cylinder block and terminal No. 2 (Black/White wire) on the component side of fuel transfer pump connector. If resistance is more than 5 ohms, go to next step. If resistance is 5 ohms or less, replace fu
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DTC P0232: FUEL SHUTOFF SIGNAL VOLTAGE TOO HIGH 1. Ensure ignition is off. Disconnect Fuel Pump Control Module (FPCM) connector. FPCM connector is located on the end of fuel injection pump. See Fig. 38 . FPCM is incorporated into fuel injection pump and may also be referred to as the fuel injection pump when referencing to the wiring diagram. 2. Turn ignition on with engine off. Using a voltmeter, check voltage at terminal No
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DTC P0234: TURBO BOOST LIMIT EXCEEDED Monitor & Set Conditions Turbo boost limit is monitored when the ignition is on. DTC may be stored if Engine Control Module (ECM) senses engine speed is greater than 2200 RPM with no intake air pressure sensor out of range DTCs present. Possible Causes Mechanical Wastegate Failure Wastegate Stuck Testing 1. Turn ignition on with engine off. Using DRBIII(R) scan tool, check for DTCs. If DTC
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DTC P0236: MAP SENSOR TOO HIGH TOO LONG Monitor & Set Conditions Manifold Air Pressure (MAP) sensor is monitored when engine is running. DTC may be stored if boost pressure signal indicates boost pressure is high when other engine parameters (i.e. speed and load) indicate boost pressure should be low or boost pressure is low when other engine parameters indicate it should be high. Possible Caus
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DTC P0237: MAP SENSOR VOLTAGE TOO LOW Monitor & Set Conditions Manifold Air Pressure (MAP) sensor voltage is monitored when engine is running. DTC may be stored if Engine Control Module (ECM) senses low MAP sensor signal voltage. Possible Causes Other DTCs Boost Pressure Sensor 5-volt Supply Circuit
