The fault indicates that the High Idle Regeneration (HIR) was aborted due to the Diesel Oxidation Catalyst (DOC) outlet temperature not reaching the expected target temperature to complete a HIR. If there are any other regeneration or fuel system related faults address those first. The CEL and MIL lamp will remain ON until a fault is resolved or a successful regeneration is completed.

Possible Causes:

• Low Fuel Compensation Pressure
• Exhaust Leaks
• Fuel Leaks
• Sticking Hydrocarbon Doser Injector valve(high doser line pressure)
• DOC outlet temperature not responding