Fault Codes 555 and 556 – 2012-2013 Ford F-650 F-750 Cummins
April 5, 2016
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.
The hose clamp may have been improperly torqued during assembly.
If an improper connection is found, replace the intake tube and torque the hose clamp to 9 Nm (80 in-lbs).
After the connection point has been inspected, follow Cummins published troubleshooting guidelines for fault codes 555 and 556.
Reference Cummins TSB070007 which outlines the step by step repair instructions for an engine with dust/debris ingestion.
If the dust/debris ingestion condition is found, the repair and related damage is eligible for reimbursement through Ford warranty.
Use causal base part number 9B613.