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Detroit DD15 GHG14 (2014-16) Fault Code: SPN 4363 FMI 4 (ACM) Selective Catalyst Reduction Outlet Temperature Sensor Circuit Failed Low

DESCRIPTION:
Selective Catalyst Reduction (SCR) outlet temperature sensor circuit failed low.

MONITORED PARAMETER:
SCR outlet temperature sensor.

TYPICAL ENABLING CONDITIONS:
Always enabled

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Always enabled

TYPICAL DURATION:
2 seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 25%

VERIFICATION:
Engine idle (1 minute).

NOTE: If code 3246-15 active, fix that first.

PROBABLE CAUSES:
1. Inspect all connectors and wiring upstream of the ACM (SCR inlet temp, ATD harness 10-pin connector, VIH 47-pin connector, and ECM 120-pin connector).
2. SCR outlet temperature sensor.
3. SCR outlet temperature sensor connector/harness.

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