Diagnostic Trouble Code (DTC) Charts - TheDieselStop.com

6.0L Diesel Diagnostic Trouble Code (DTC) DescriptionsDTC Description Possible Causes Diagnostic Aids451 through 458 — DTC 451-458 is set by the • DTC 451-458 usually The last digit in the injectorCylinder #1 through PCM when the rising time indicates the harness or DTC corresponds to theCylinder #8 High Side to 20 amps is zero on the coil is shorted to ground cylinder where a fault hasShort To Ground Or open or close coil. been detected.VPWR523 — IDM VPWR The IDM internally monitors • DTC 523 can be set due DTC 523 is set by theVoltage Low battery voltage. When the to poor connections PCM when the voltageIDM continuously receives between the IDM terminal from the ignition switch isless than 7 volts, a DTC X3-7 and the ignition less than 7 volts.will be set.switch.525 — IDM Fault DTC 525 is set by the • IDM When DTC 525 is set,PCM when there is aninstall a new IDM.internal IDM failure.533 — IDM Relay Voltage DTC 533 is set by the • DTC 533 can be set due DTC 533 can be set whenHigh PCM when the voltage to a generator voltage jump starting the enginefrom the IDM power relay output of greater than 16exceeds 16 volts.volts or an incorrectexternal batteryconnections exist.534 — IDM Relay Voltage DTC 534 is set by the • DTC 534 can be set due IDM relay voltage is lessLow a PCM when the voltage to a defective generator, than 7 volts.from the IDM power relay IDM power relay,is less than 7 volts.discharged batteries orincreased resistance inthe battery feed circuits543 — PCM/IDM DTC 543 is set by the • DTC 543 can be set If IDM power is low, DTCCommunications Fault PCM when the PCM is not when the CAN 2 lines 543 can be set.communicating with the between the PCM andIDM.IDM are shorted toground, VREF, battery orthe current is open.• When DTC 543 is activethe amber ENGINEindicator is illuminated.551 — IDM/CMPO Signal DTC 551 is set by the • DTC 551 can be set DTC 551 can also be setInactive PCM when no CMPO when the CMPO is open, when no CMPO/CKPO issignal is present while the or shorted to ground or present while the PCMCKPO is active. shorted to a voltage reports it is in the runsource. If logic power is mode.low, DTC 551 can be set.552 — IDM Incorrect DTC 552 is set when the • DTC 552 can be set due The PCM continuouslyCMPO Signal Signature CMPO transition occurs at to a camshaft incorrectly monitors the IDM. Whenthe wrong CKPO tooth. timed to crankshaft or an the PCM fails to receiveelectrical noise creating a required continuous(Continued)miscount on CMPlocation.communication from theIDM, the PCM will set aDTC2004 F650/F750 6.0L Diesel