Detroit DD15 EPA10 (2010-13) Fault Code: SPN 4337 FMI 4 (ACM) Diesel Exhaust Fluid Temperature Sensor Circuit Failed Low

DESCRIPTION:
Diesel exhaust fluid (DEF) temperature sensor circuit failed low.

MONITORED PARAMETER:
DEF temperature sensor.

TYPICAL ENABLING CONDITIONS:
Always enabled

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Always enabled

TYPICAL DURATION:
Two seconds

DASH LAMPS:
1. MIL
2. CEL

VERIFICATION:
Engine Idle: One minute.

PROBABLE CAUSES:
1. DEF metering unit temperature sensor.
2. DEF metering unit temperature sensor connector/harness.

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