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Detroit DD15 GHG14 (2014-16) Fault Code: SPN 3556 FMI 0 (ACM) Regeneration Temperature – Out of Range High

DESCRIPTION:
This code sets when the ACM detects that the DOC outlet temperature sensor is greater that the modeled threshold.

MONITORED PARAMETER:
Diesel Oxidation Catalyst (DOC) temperature outlet temperature sensor.

TYPICAL ENABLING CONDITIONS:
Aftertreatment 1 hydrocarbon doser data valid but above normal operational range – most server level.

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
Two seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 25%

NOTE: If codes 3242-3, 3242-4, 3242-8, 3250-3, 3250-4, or 3250-8 active, fix those first.

PROBABLE CAUSES:
1. Inspect entire exhaust & fuel system for leaks.
2. Inspect all 3 temperature sensors on the DPF/DOC system.
3. Inspect fuel line from doser block assy to the doser injection valve for kinks.
4. Remove the doser injection valve and coolant block from turbo outlet and inspect for carbon buildup. If present, replace the doser injector valve.
5. Clean the doser fuel lines.
6. Perform stationary regen.
7. Replace the HC doser block assy.

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