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Detroit DD15 EPA10 (2010-13) Fault Code: SPN 520249 FMI 4 (MCM) Quantity Control Valve Low Side Driver Error

DESCRIPTION:
This code sets when the selective catalytic reduction (SCR) inlet temperature is greater than 760 °C (1400 °F).

MONITORED PARAMETER:
SCR inlet temperature sensor

TYPICAL ENABLING CONDITIONS:
Non- Regen mode

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 code 3246-15 present, fix that first.

PROBABLE CAUSES:
1. SCR inlet temperature sensor.
2. SCR inlet temperature sensor connector/harness.

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