Detroit DD16 EPA10 (2010-13) Fault Code: SPN 4353 FMI 3 (ACM) Diesel Exhaust Fluid Metering Unit Diffuser Heater Circuit Failed High

NOTE: Please see the step by step troubleshooting procedures for this specific code.

NOTE: If code not active, release vehicle to customer.

1. DEF metering unit diffuser heater.
2. DEF metering unit diffuser heater connector/harness.
3. DEF doser valve.