Diagnostic Trouble Code (DTC) Charts - TheDieselStop.com

6.0L Diesel Diagnostic Trouble Code (DTC) DescriptionsDTC Description Possible Causes Diagnostic Aids353 - Variable Geometry DTC 353 is set when the • Oil pressure and quality Make sure all sensor,Turbo Control Over Duty PCM overcompensates by • High intake restriction injector and actuatorCycle increasing duty cycle to the • Intake/CAC system leak electrical DTCs have beenVGT to achieve desired (pipes, loose clamps, repaired.boost/backpressurehoses)• Exhaust system leak• BAP sensor bias low• MAP sensor bias low• EBP sensor bias low• ICP sensor bias high• Power cylinder integrity• ICP system integrity• Injector operation/partnumber• EGR valve stuck open• VGT valve or vanessticking• VGT control circuit open354 — Variable Geometry DTC 354 is set when the • Oil pressure and quality. Make sure all sensor,Turbo Control Under PCM overcompensates by • BAP sensor bias high. injector and actuatorDuty Cycle decreasing duty cycle to • MAP sensor bias high. electrical DTCs have beenthe VGT to achieve the • EBP sensor bias high. repaired.desiredboost/backpressure.• Open exhaust (nomuffler).• ICP sensor bias low.• ICP system integrity.• Injector operation/partnumber• Exhaust restriction(muffler or catalyticconverter)355 — Variable Geometry DTC 355 is set when the • High intake restriction Make sure all sensor,Turbo Overspeed PCM detects turbo over • Intake/CAC system leak injector and actuatorspeed several times in a (pipes, loose clamps, electrical DTCs have beenspecific period of time hoses) repaired.(dependent on PCM • Restricted CAC systemcalibration). Turbo speed is • VGT valves or vanesestimated by engine speed, sticking(Continued)boost pressure, andbarometric pressure.• Open exhaust (nomuffler)• BAP sensor bias• MAP sensor bias high• EBP sensor bias low2004 F650/F750 6.0L Diesel