OBDII Error Codes
Everything pertaining to OBDII diagnostics and error code reading and troubleshooting.
132 Cummins articles in this category
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P0462 LOW VOLTAGE DETECTED AT THE FUEL LEVEL SENSOR When Monitored and Set Condition: When Monitored: Ignition on and battery voltage above 10.4 volts. Set Condition: The signal voltage from the sensor falls below a calibrated value for a calibrated amount of time. POSSIBLE CAUSES FUEL LEVEL SENSOR (G8) SIGNAL CIRCUIT OPEN
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P0463 HIGH VOLTAGE DETECTED AT THE FUEL LEVEL SENSOR When Monitored and Set Condition: When Monitored: Ignition on and battery voltage above 10.4 volts. Set Condition: The signal voltage from the sensor goes above a calibrated value for a calibrated amount of time. POSSIBLE CAUSES FUEL LEVEL SENSOR (G8) SIGNAL CIRCUIT SHORTED TO GROUND&
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P0477 LOW VOLTAGE ON THE ENGINE BRAKE DRIVER When Monitored and Set Condition: When Monitored: When the ignition is on. Set Condition: When the signal from the engine brake driver output does not match the signal from the engine brake driver feedback. POSSIBLE CAUSES WIRING HARNESS ENGINE BRAKE DRIVER RELAY
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P0478 HIGH VOLTAGE ON THE ENGINE BRAKE DRIVER When Monitored and Set Condition: When Monitored: When the ignition is on. Set Condition: When the signal from the engine brake driver output does not match the signal from the engine brake driver feedback. POSSIBLE CAUSES RELAY LOOSE ENGINE BRAKE DRIVER CONTROL CIRCUIT SHORTED TO VO
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P0480 FAN CLUTCH When Monitored and Set Condition: When Monitored: When the ignition is on. Set Condition: The PWM signal to the fan clutch does not match the PWM signal from the fan clutch. POSSIBLE CAUSES FAN CLUTCH WIRE HARNESS DAMAGED OPEN FAN CLUTCH (Y1) DRIVER CIRCUIT (Y1) DRIVER C
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P0483 FAN SPEED When Monitored and Set Condition: When Monitored: While the engine is running. Set Condition: The actual fan speed is less than 75 RPM or more than 4000 RPM. POSSIBLE CAUSES OTHER DTC'S (Y5) SIGNAL CIRCUIT SHORT TO 5-VOLT SUPPLY (Y3) CIRCUIT (Y5) SIGNAL CIRCUIT OPEN FROM ECM TO FAN CLUTCH ASSEMBL
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P0500 NO VEHICLE SPEED SENSOR SIGNAL When Monitored and Set Condition: When Monitored: While the engine is running. Set Condition: The ECM indicates signals of motion; however, the VSS does not. POSSIBLE CAUSES VEHICLE SPEED (G7) SIGNAL CIRCUIT SHORTED TO VOLTAGE VEHICLE SPEED (G7) SIGNAL CIRCUIT OPEN BETWEEN CAB AND ECM
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P0514 BATTERY TEMPERATURE SENSOR RATIONALITY When Monitored and Set Condition: When Monitored: While the engine is running. Set Condition: The ECM does not read a change in value from the sensor over time. POSSIBLE CAUSES BATTERY TEMP SENSOR INTERMITTENT CONDITION DIAGNOSTIC PROCEDURE
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P0516 LOW VOLTAGE AT THE BATTTERY TEMP SENSOR When Monitored and Set Condition: When Monitored: With the ignition on and battery voltage greater than 10.4 volts. Set Condition: The circuit voltage to the ECM falls below a calibrated threshold for a certain period of time. POSSIBLE CAUSES BATTERY TEMP SENSOR (K118) SIGNAL CIRCUIT SHORTED
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P0517 HIGH VOLTAGE AT THE BATTERY TEMP SENSOR When Monitored and Set Condition: When Monitored: With ignition on and battery voltage greater than 10.4 volts. Set Condition: The circuit voltage to the ECM is above a calibrated threshold for a certain period of time. POSSIBLE CAUSES BATTERY TEMP SENSOR (K118) SIGNAL CIRCUIT OPEN &
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P0521 OIL PRESSURE SWITCH RATIONALITY When Monitored and Set Condition: When Monitored: While the key is on. Set Condition: Oil pressure is detected with engine RPM = 0 for 30 seconds. POSSIBLE CAUSES OIL PRESSURE SWITCH (G60) SIGNAL CIRCUIT OPEN INTERMITTENT CONDITION ECM
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P0524 OIL PRESSURE TOO LOW When Monitored and Set Condition: When Monitored: While the engine is running. Set Condition: The oil pressure detected by the ECM is less than a calibrated value. POSSIBLE CAUSES LOW OIL LEVEL (G60) SIGNAL CIRCUIT SHORT TO GROUND OIL PRESSURE SWITCH INTERNAL E
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P0532 A/C SENDING UNIT VOLTS TOO LOW When Monitored and Set Condition: When Monitored: With the ignition on and battery voltage greater than 10.4 volts. Set Condition: The circuit voltage to the ECM falls below a calibrated threshold for a certain period of time. POSSIBLE CAUSES OTHER DTC'S A/C PRESSURE SENSOR (
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P0533 A/C SENDING UNIT VOLTS TOO HIGH When Monitored and Set Condition: When Monitored: With the ignition on and battery voltage greater than 10.4 volts. Set Condition: The circuit voltage to the ECM is above a calibrated threshold for a certain period of time. POSSIBLE CAUSES OTHER DTC'S A/C PRESSURE SENSOR (C1
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P0541 LOW VOLTAGE ON THE #1 INTAKE AIR HEATER RELAY When Monitored: When the ignition is on. Set Condition: When the signal from the #1 intake air heater output does not match the signal from the #1 intake air heater feedback. POSSIBLE CAUSES LOOSE CONNECTION INTAKE AIR HEATER RELAY SIGNAL CIRCUIT OPEN FROM RELAY TO ECM
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P0542 HIGH VOLTAGE ON THE #1 INTAKE AIR HEATER RELAY When Monitored: When the ignition is on. Set Condition: When the signal from the #1 Intake Air Heater output does not match the signal from the #1 Intake Air Heater feedback. POSSIBLE CAUSES LOOSE CONNECTION INTAKE AIR HEATER RELAY SIGNAL CIRCUIT SHORTED TO BATTERY NEGATIVE ECM
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P0562 BATTERY VOLTAGE LOW When Monitored and Set Condition: When Monitored: With the key on or the engine running. Set Condition: The battery voltage detected by the ECM is less than a calibrated value. POSSIBLE CAUSES P0622 PRESENT P2502 PRESENT P2503 PRESENT BATTERY TERMINAL CONNECTION
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P0562 LOW BATTERY VOLTAGE When Monitored and Set Condition: When Monitored: With the engine running and the PCM has closed the Transmission Control Relay. Set Condition: If the battery voltage of the Transmission Control Relay Output Sense circuit(s) to the PCM is less than 10.0 volts for the period of 15 seconds. Note: P0562 generally indicates a gradually falling battery voltage or a resistive connection(s) to the P
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P0563 BATTERY VOLTAGE HIGH When Monitored and Set Condition: When Monitored: With the key on or the engine running. Set Condition: The battery voltage detected by the ECM is greater than a calibrated value. POSSIBLE CAUSES P0622 PRESENT P2502 PRESENT P2504 PRESENT BATTERIES IMPROPERLY IN
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P0572 LOW VOLTAGE DETECTED AT THE BRAKE SWITCH When Monitored and Set Condition: When Monitored: While the ignition is on. POSSIBLE CAUSES BRAKE SWITCH INPUT SHORTED TO GROUND DIAGNOSTIC PROCEDURE Repair Brake switch circuit shorted to ground.
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P0573 HIGH VOLTAGE DETECTED AT THE BRAKE SWITCH When Monitored and Set Condition: When Monitored: While the ignition is on. Set Condition: POSSIBLE CAUSES BRAKE SWITCH SHORTED TO VOLTAGE DIAGNOSTIC PROCEDURE Repair Brake switch shorted to voltage.
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P0580 LOW VOLTAGE DETECTED AT THE SPEED CONTROL SWITCH When Monitored and Set Condition: When Monitored: While the ignition is on Set Condition: Speed control MUX switch below 1.0 volts for 5 seconds. POSSIBLE CAUSES S/C WIRING HARNESS OBSERVABLE PROBLEM S/C SWITCH (ON/OFF) CLOCKSPRING SHORTED TO GROUND
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P0581 HIGH VOLTAGE DETECTED AT THE SPEED CONTROL SWITCH When Monitored and Set Condition: When Monitored: Key on or Engine running. Set Condition: Speed Control MUX switch above 11.5 volts for 5 seconds. POSSIBLE CAUSES S/C WIRING HARNESS OBSERVABLE PROBLEM CLOCKSPRING SIGNAL/GROUND CIRCUIT OPEN SPEED CONTROL ON
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P0583 LOW VOLTAGE DETECTED AT THE SPEED CONTROL VACUUM DRIVER When Monitored and Set Condition: When Monitored: With engine running and Speed control engaged. Set Condition: This code will set if the voltage detected on the Speed Control Vacuum circuit at the ECM is different than the expected voltage for 3 seconds. POSSIBLE CAUSES P0595 OR P0596 PRESENT
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P0583 LOW VOLTAGE DETECTED AT THE SPEED CONTROL VACUUM DRIVER When Monitored and Set Condition: When Monitored: With engine running and Speed control engaged. Set Condition: This code will set if the voltage detected on the Speed Control Vacuum circuit at the ECM is different than the expected voltage for 3 seconds. POSSIBLE CAUSES P0595 OR P0596 PRESENT
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