DESCRIPTION:The fault indicates that the diesel exhaust fluid (DEF) dosing unit was switch off before completing a cycle.
MONITORED PARAMETER:DEF pressure
TYPICAL ENABLING CONDITIONS:When service routine is enabled and during infrequent in-use check under non DEF dosing conditions.
MONITOR SEQUENCE:None
EXECUTION FREQUENCY:Service tool and infrequent in-use checks during DEF dosing conditions.
TYPICAL DURATION:Two seconds
DASH LAMPS:1. MIL2. CEL
ENGINE REACTION:Derate 25%
VERIFICATION:Selective catalyst reduction (SCR) airless dosing system (ADS) self-check routine.
NOTE: If any other codes present, repair those first.
PROBABLE CAUSES:1. DEF dosing unit harness connector/wiring.2. Dosing unit failure.
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