Detroit DD16 EPA10 (2010-13) Fault Code: SPN 520249 FMI 4 (ACM) Selective Catalytic Reduction Inlet Temperature High
NOTE: This condition can occur when:
1. MCM pin 2 circuit is shorted to ground.
2. Quantity Control Valve (QCV) internal short to ground.
DESCRIPTION:
Quantity Control Valve (Low Side) Error
MONITORED PARAMETER:
Quantity control valve
TYPICAL ENABLING CONDITIONS:
Always enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Continuous when enabling conditions met
TYPICAL DURATION:
Two seconds
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
Derate 25%
VERIFICATION:
Engine Idle: One minute.
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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