Detroit DD13 EPA10 (2010-13) Fault Code: SPN 4337 FMI 3 (ACM) Diesel Exhaust Fluid Metering Unit Temperature – Drift
NOTE: Please see the step by step troubleshooting procedures for this specific code.
PROBABLE CAUSES:
1. DEF metering unit temperature sensor.
2. DEF metering unit temperature sensor connector/harness
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