Detroit DD15 GHG14 (2014-16) Fault Code: SPN 4353 FMI 4 (ACM) Diffuser Heater Circuit Failed Low
NOTE: This fault will turn on the MIL and CEL lamps.
NOTE: If code not active, release vehicle to customer.
PROBABLE CAUSES:
1. DEF metering unit diffuser heater.
2. DEF metering unit diffuser heater connector/harness.
3. DEF doser valve.
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