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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 P1285: FUEL INJECTION PUMP CONTROLLER ALWAYS ON Monitor & Set Conditions Fuel Pump Control Module (FPCM) is monitored with ignition off and less than 600 RPM. DTC may set when more than 4 CAN BUS messages are received from FPCM while key is off and RPM is less than 600. Possible Causes Fuel Injection Pump Relay Stuck On Testing &#
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DTC P1286: ACCELERATOR POSITION SENSOR (APPS) SUPPLY VOLTAGE TOO HIGH Monitor & Set Conditions Accelerator Pedal Position Sensor (APPS) supply voltage is monitored when engine is running. DTC may be stored if Engine Control Module (ECM) senses high voltage on APPS supply circuit. Possible Causes APPS Supply Circuit Shorted To Voltage APPS S
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DTC P1287: FUEL INJECTION PUMP CONTROLLER SUPPLY VOLTAGE LOW Monitor & Set Conditions Fuel injection pump controller supply voltage is monitored when ignition is on. DTC may be stored if low voltage exists. Possible Causes Charging System Not Operating Properly Testing Check that charging system is operating prope
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DTC P1291: NO TEMPERATURE RISE SEEN FROM INTAKE AIR HEATERS Monitor & Set Conditions Temperature rise from intake air heaters is monitored for first 15 seconds of engine operation. DTC may be stored if initial Intake Air Temperature (IAT) sensor reading is 0-66°F (-17.8 to 18.8°C), Battery Temperature Sensor (BTS) and IAT sensor are within 10°F of each other, time between end of preheat and engine run state is less than 3
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DTC P1295: ACCELERATOR POSITION SENSOR (APPS) SUPPLY VOLTAGE TOO LOW Monitor & Set Conditions Accelerator Pedal Position Sensor (APPS) supply voltage is monitored when engine is running. DTC may be stored if low APPS signal circuit voltage exists, or low voltage is detected between Engine Control Module (ECM) and Powertrain Control Module (PCM). Possible Causes APP
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DTC P1388: AUTO SHUTDOWN RELAY CONTROL CIRCUIT 1. Turn ignition on with engine off. Using scan tool, actuate ASD relay. Listen for clicking sound at ASD relay. The ASD relay is located in power distribution center at driver's side front corner of engine compartment. See Fig. 54 . If clicking sound is heard at ASD relay, go to next step. If clicking sound is not heard at ASD relay, go to step 4 . 2. Stop actuation of ASD relay
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DTC P1389: NO ASD RELAY OUTPUT VOLTAGE AT PCM 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, go to step 4 . 2. Ensure ignition is on with engine off. Using scan tool, check for DTCs. Check that displayed DTC matches the FREEZE FRAME DTC. If DTCs display
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DTC P1475: AUXILIARY 5 VOLT OUTPUT TOO HIGH Monitor & Set Conditions Auxiliary 5-volt output circuit is monitored with ignition on engine off, and with engine running. DTC may set if voltage on 5-volt sensor supply circuit exceeds 5.7 volts for 5 seconds. Possible Causes 5-volt Supply Circuit Shorted To Battery Voltage Wiring Harness Or Con
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DTC P1488: AUXILIARY 5 VOLT OUTPUT TOO LOW Monitor & Set Conditions Auxiliary 5-volt output circuit is monitored with ignition on engine off, and with engine running. DTC may set if voltage on 5-volt sensor supply circuit is less than 4.3 volts for 5 seconds. Possible Causes Manifold Absolute Pressure (MAP) Sensor Camshaft Position (CMP) Se
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DTC P1492: AMBIENT/BATT TEMP SEN VOLTS TOO HIGH 1. Turn ignition on with engine off. Using scan tool, read battery temperature sensor voltage. Battery temperature sensor voltage may also be referred to as BTS voltage. If battery temperature sensor voltage is more than 4.5 volts, go to next step. If battery temperature sensor voltage is 4.5 volts or less, go to step 6 . 2. Turn ignition off. Disconnect battery temperature sens
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DTC P1493: AMBIENT/BATTERY TEMPERATURE SENSOR VOLTS TOO LOW 1. Turn ignition on with engine off. Using scan tool, read battery temperature sensor voltage. Battery temperature sensor voltage may also be referred to as BTS voltage. If battery temperature sensor voltage is less than .5 volt, go to next step. If battery temperature sensor voltage is .5 volt or more, go to step 5 . 2. Turn ignition off. Disconnect battery temperat
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DTC P1594: CHARGING SYSTEM VOLTAGE TOO HIGH 1. Turn ignition on with engine off. Using scan tool, actuate generator field driver. Using 12-volt test light, check for voltage at terminal No. 1 (Dark Green wire) on 2-wire connector at rear of generator. If test light blinks on and off, go to next step. If test light does not blink on and off, go to step 5 . 2. Start engine and allow engine to idle. Using scan tool, read target
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DTC P1595: SPEED CONTROL SOLENOID CIRCUITS 1. Turn ignition on with engine off. Using scan tool, actuate speed control vent solenoid and listen for operating sound (click) at speed control servo. Speed control servo is located below driver's side battery tray. See Fig. 59 . If operating sound is heard at speed control servo, go to next step. If operating sound is not heard at speed control servo, go to step 6 . 2. Ensure igni
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DTC P1596: SPEED CONTROL SWITCH ALWAYS HIGH 1. Start engine and allow engine to idle. Using scan tool in INPUTS/OUTPUTS mode, read speed control inputs. Monitor display on scan tool while turning speed control on/off switch on the steering wheel to ON and OFF positions several times with the switch returned to the ON position. If scan tool displays speed control on/off switch turns OFF and ON, go to next step. If scan tool does not display speed control
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DTC P1597: SPEED CONTROL SWITCH ALWAYS LOW 1. Start engine and allow engine to idle. Using scan tool in SENSORS mode, read speed control switch voltage. Speed control switch voltage may also be referred to as S/C switch voltage. If speed control switch voltage is less than one volt, go to next step. If speed control switch voltage is one volt or more, conditions required for DTC to be set are not present at this time. Test is complete.
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DTC P1682: CHARGING SYSTEM VOLTAGE TOO LOW 1. Ensure battery is fully charged and generator drive belt is in good condition and properly adjusted before proceeding. Start engine and allow engine to idle. Using scan tool, read target charging voltage. If target charging voltage is more than 15.1 volts, go to next step. If target charging voltage is 15.1 volts or less, go to step 4 . 2. Ensure engine is idling and at normal ope
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DTC P1683: SPEED CONTROL POWER RELAY OR SPEED CONTROL 12V DRIVER CIRCUIT 1. Ensure ignition is off. Disconnect speed control servo connector. Speed control servo is located below driver's side battery tray. See Fig. 59 . 2. Turn ignition on with engine off. Using scan tool, actuate speed control servo. Using 12-volt test light, check for voltage at terminal No. 3 (Dark Blue/Red wire) on speed control servo connector. DO NOT d
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DTC P1687: NO CLUSTER BUS MESSAGE 1. Turn ignition on with engine off. Using scan tool, check for DTCs. If DTC SPECIFIC GOOD TRIP counter is displayed and equal to zero, go to next step. If DTC SPECIFIC GOOD TRIP counter is not displayed and equal to zero, go to step 5 . 2. Turn ignition off. Disconnect PCM connectors. PCM is located at passenger's side rear corner of engine compartment. Note location of connectors C1 and C2
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DTC P1688: INTERNAL FUEL INJECTION PUMP FAILURE Monitor & Set Conditions Fuel Pump Control Module (FPCM) is monitored with ignition on engine off, and with engine running. DTC may set if FPCM, PCM memory, programming or hardware error is detected. Possible Causes Good Trip Counter Equals Zero Fuel Pump Control Module (FPCM)
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DTC P1689: NO COMMUNICATION BETWEEN ECM & INJECTION PUMP MODULE (OBDII) Monitor & Set Conditions Communication between Engine Control Module (ECM) and fuel injection pump module is monitored when ignition is on. Injection pump module is referred to as Fuel Pump Control Module (FPCM) in test procedures. DTC may be stored if the time between CAN messages is more than 3 seconds or FPCM does not receive CAN message.
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DTC P1690: FUEL INJECTION PUMP CKP SENSOR DOES NOT AGREE WITH ECM CKP SENSOR Monitor & Set Conditions Fuel Injection Pump Crankshaft Position (CKP) circuit is monitored when ignition is on and engine is running. DTC may be stored when no signal exists within specified window parameters with no Camshaft Position (CMP) sensor or CKP DTCs present. Possible Causes AC N
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DTC P1691: FUEL INJECTOR PUMP CONTROLLER CALIBRATION Monitor & Set Conditions Fuel injection pump controller calibration is monitored with ignition on engine off and with engine running and no CAN BUS errors reported. DTC may be set when PCM fuel injector pump controller and ECM RPM are mismatched or fuel commanded does not equal amount fueled. Possible Causes Fuel
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DTC P1693: DTC DETECTED IN COMPANION MODULE Turn ignition on with engine off. Using scan tool, clear DTCs from PCM. Using scan tool, check for stored DTCs in ECM. Perform appropriate test procedure for stored DTCs in ECM. Perform TEST VER-2A . Mopar's Note's: This error code cannot exist by itself and will have other error codes present in the ECM and/or PCM you'll most likely require an OBDII scan tool to get the codes. P1693 is nothing more than a flag that is
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DTC P1694: NO BUS MESSAGES RECEIVED FROM COMPANION MODULE 1. Turn ignition on with engine off. Using scan tool, select BODY and select type of instrument cluster that vehicle is equipped with. Once type of instrument cluster is selected, the bus operational test will be performed automatically. If scan tool displays BUS OPERATIONAL, go to next step. If scan tool does not display BUS OPERATIONAL, refer to symptoms displayed on scan tool to identify the b
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DTC P1696: PCM FAILURE EEPROM WRITE DENIED Monitor & Set Conditions Powertrain Control Module (PCM) EEPROM is monitored continuously when ignition is on. DTC may be stored if attempt to program or write to the internal EEPROM failed. Also checks at powerdown. Possible Causes DRBIII(R) Displays Write Failure DRBIII(R) Displays Write Refused
