Fault Codes 555 and 556 – 2012-2013 Ford F-650 F-750 Cummins

May 5 2017 4794 – 2012-2013 F-650/750 Cummins With Fault Codes 555 and 556 Some 2012-2013 F-650/750 with a Cummins Diesel Engine may set fault codes 555 and 556 for high crankcase pressure. Reference Cummins TSB140117 on Cummins QuickServe Online and inspect the connection point between the turbocharger inlet and clean air intake hose.   …

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