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 P0523: OIL PRESSURE VOLTAGE TOO HIGH 1. Turn ignition on with engine off. Using scan tool, check for DTCs. If DTC P1475: AUXILIARY 5 VOLT OUTPUT TOO HIGH does not exist, go to next step. If DTC P1475: AUXILIARY 5 VOLT OUTPUT TOO HIGH is present, perform DTC P1475: AUXILIARY 5 VOLT OUTPUT TOO HIGH test. 2. Using scan tool, recheck for any other DTCs. If no other DTCs exist, go to next step. If any other DTCs exist, repair
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DTC P0524: OIL PRESSURE TOO LOW 1. Ensure engine oil level is correct. Oil pressure should be checked. Disconnect engine oil pressure sensor connector. Engine oil pressure sensor is located on driver's side of cylinder block, just behind Engine Control Module (ECM) and contains 3-pin connector. See Fig. 48 . ECM is located on driver's side of engine, just in front of fuel transfer pump and contains a 50-pin connector. Remove engine oil pressure sensor a
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DTC P0562: BATTERY VOLTAGE LOW Monitor & Set Conditions Battery voltage low condition is monitored with ignition on and engine off, and with engine running. DTC may set if battery voltage goes to less than 6 volts for 10 seconds. Possible Causes Low battery voltage Testing Repair cause f
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DTC P0562: CHARGING SYSTEM VOLTAGE TOO LOW Monitor & Set Conditions Charging system voltage is monitored when ignition is on. DTC may be stored if battery supply voltage (B+ circuit) at Engine Control Module (ECM) is less than 6 volts. Possible Causes PCM Codes ECM Fused B+ Circuit Open Grou
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DTC P0563: BATTERY VOLTAGE HIGH Monitor & Set Conditions Battery voltage high condition is monitored with ignition on and engine off, and with engine running. DTC may set if battery voltage goes to greater than maximum volts for 10 seconds. Possible Causes Battery voltage too high Testing Repair cause for high bat
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DTC P0563: CHARGING SYSTEM VOLTAGE TOO HIGH Monitor & Set Conditions Charging system voltage is monitored when ignition is on. DTC may be stored if battery supply voltage (B+ circuit) at Engine Control Module (ECM) is greater than 17 volts. Possible Causes DTC Present In The PCM ECM Ground Circuit(s) Open High Volta
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DTC P0572: BRAKE SWITCH INPUT #1 SIGNAL MISSING Monitor & Set Conditions Brake switch input No. 1 signal is monitored with ignition on engine off, and with engine running. DTC may set if Engine Control Module (ECM) sees brake switch OFF and PCM sees brake switch ON for 3 seconds. Condition must be met 10 times for DTC to set. Possible Causes Wire From Brake Switch
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DTC P0573: BRAKE SWITCH INPUT #2 SIGNAL MISSING Monitor & Set Conditions Brake switch input No. 2 signal is monitored with ignition on engine off, and with engine running. DTC may set if Engine Control Module (ECM) sees brake switch ON and PCM sees brake switch OFF for 3 seconds. Condition must be met 10 times for DTC to set. Possible Causes Brake Switch CCD BUS Si
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DTC P0601: PCM INTERNAL CONTROLLER FAILURE Monitor & Set Conditions Powertrain Control Module (PCM) internal controller is monitored when ignition is on. DTC may be stored when internal checksum for software failed or does not match calculated value. Possible Causes PCM Testing Replace and program PCM. See appropr
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DTC P0602: ECM FUELING CALIBRATION Monitor & Set Conditions Engine Control Module (ECM) fueling calibration error is monitored when ignition is on. DTC may be stored if any parameter is out of range for one second. Possible Causes Good Trip Counter Equals Zero ECM Testing 1. Turn ignition
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DTC P0606: ECM FAILURE Monitor & Set Conditions ECM is monitored for internal failure with ignition on engine off, and with engine running. DTC may be set when an internal ECM error is detected. Possible Causes ECM Testing Turn ignition on with engine off. Using DRBIII(R) scan tool, check for DTCs. If Good Trip Co
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DTC P0622: GENERATOR FIELD NOT SWITCHING PROPERLY Monitor & Set Conditions Generator field switching is monitored when ignition is on and when engine is running. DTC may be stored if Powertrain Control Module (PCM) tries to regulate generator field with no result during monitoring. Possible Causes Intermittent Condition Generator Field Sour
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DTC P0645: A/C CLUTCH RELAY CIRCUIT Monitor & Set Conditions A/C clutch relay may also be referred to as A/C compressor clutch relay. A/C clutch relay circuit is monitored when ignition is on and battery voltage is greater than 10.4 volts. DTC may be stored if an open or short exists in A/C clutch relay control circuit. Possible Causes Intermittent Condition
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DTC P0711: TRANS TEMP SENSOR, NO TEMP RISE AFTER START Circuit Description Circuit is monitored continuously while ignition is on and engine is running. DTC sets if after 2 trips, transmission temperature is less than 40°F (5°C) and does not increase more than 16°F (8°C) after 20 minutes of driving with vehicle speed greater than 30 MPH. DTC will also set if engine temperature is less than 100°F (38°C), and transmission tempe
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DTC P0712: TRANS TEMP SENSOR VOLTAGE TOO LOW Circuit Description Circuit is monitored continuously while ignition is on and engine is running. DTC sets if transmission temperature sensor voltage is less than 1.55 volts for 2.2 seconds. Possible Cause Transmission temperature sensor wiring harness defective. Governor pressure/temperature sensor
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DTC P0713: TRANS TEMP SENSOR VOLTAGE TOO HIGH Circuit Description Circuit is monitored continuously while ignition is on and engine is running. DTC sets if transmission temperature sensor voltage is greater than 3.76 volts for 2.2 seconds. Possible Cause Transmission solenoid and wiring harness assembly defective. Transmission temperature senso
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DTC P0720: LOW OUTPUT SPEED SENSOR RPM ABOVE 15 MPH Circuit Description Circuit is monitored continuously while ignition is on and gearshift lever is not in Park or Neutral. DTC sets if vehicle speed is above 15 MPH and output shaft speed is less than 60 RPM for 2.6 seconds as measured from vehicle speed signal. Possible Cause Open output speed sensor ground circuit.&#
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DTC P0740: TORQUE CONVERTER CLUTCH, NO RPM DROP AT LOCKUP Circuit Description Circuit is monitored continuously while ignition is on and gearshift lever is not in Park or Neutral. DTC sets if TCC does not achieve desired drop in RPM when TCC solenoid is near maximum duty cycle. A test failing 3 consecutive times is required to set DTC. Possible Cause Misfire DTC set.&#
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DTC P0743: TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY CIRCUITS Circuit Description Circuit is monitored continuously while ignition is on. DTC sets if voltage detected on TCC at PCM does not match desired voltage. Possible Cause The following items may be area of concern: Fused B+ feed to transmission control circuit open.
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DTC P0748: GOVERNOR PRESSURE SOLENOID CONTROL/TRANSMISSION RELAY CIRCUITS Circuit Description Circuit is monitored continuously while ignition is on. DTC sets if voltage detected on governor pressure solenoid control circuit at the PCM does not match desired voltage. Possible Cause The following items may be area of concern: Fused B+ circuit
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DTC P0751: OD OFF SWITCH PRESSED (LO) MORE THAN 5 MINUTES Circuit Description Circuit is monitored after engine is running for 10 seconds and reviewed every 440 ms. DTC sets if overdrive switch is held low for 5 minutes or more from time of closure or ignition on. Possible Cause The following items may be area of concern: Intermittent OD OFF
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DTC P0753: TRANSMISSION 3-4 SHIFT SOLENOID/TRANSMISSION RELAY CIRCUITS Circuit Description Circuit is monitored continuously while ignition is on. DTC sets if voltage detected on 3-4 shift solenoid control circuit at the PCM does not match expected voltage. Possible CauseP0753 Trans 3-4 Shift Solenoid / Trans Relay Circuits The following items may be area of concern:
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DTC P0783: 3-4 SHIFT SOLENOID, NO RPM DROP @ 3-4 SHIFT Circuit Description Circuit is monitored continuously while ignition is on and engine is running. DTC sets if expected RPM drop does not occur within 4 seconds of requested gear change by PCM. Test must fail 3 times to set DTC. Possible Cause The following items may be area of concern: T
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DTC P1283: IDLE SELECT SIGNAL INVALID Monitor & Set Conditions Idle select switch signal is monitored when ignition is on. DTC may be stored if Fuel Pump Control Module (FPCM) detects a false low idle select signal from ECM. FPCM is incorporated into fuel injection pump and may also be referred to as the fuel injection pump when referencing to wiring diagram. Possible Causes
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DTC P1284: FUEL INJECTOR PUMP BATTERY VOLT OUT-OF-RANGE 1. Turn ignition on with engine off. Using scan tool, check for DTCs. If DTC SPECIFIC GOOD TRIP counter is not displayed and equal to zero, go to next step. If DTC SPECIFIC GOOD TRIP counter is displayed and equal to zero, replace fuel injection pump. Perform TEST VER-5A . 2. At this time, conditions required for DTC to be stored are not present. Ensure ignition is on wi
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