Detroit DD15 GHG14 (2014-16) Fault Code: SPN 4331 FMI 18 (ACM) DEF Dosing Quantity Low

NOTE: The fault indicates that the DEF pump speed is high compared to DEF quantity delivered. The CEL lamp will remain on until the fault is resolved.

NOTE: If code 3364-xx present, fix that first.

PROBABLE CAUSES:
1. Check all DEF supply lines for damage or leaks.
2. DEF tank is contaminated with gas, diesel, water, etc…
3. Doser valve failure.
4. DEF pump.
5. DEF pump connection/harness.

Categories DD15 GHG14 (2014-16), Detroit, DTC TRUCKS Tags 16, 18, 2014, 4331, ACM, Code, DD15, DEF, Detroit, Dosing, Fault, FMI, GHG14, Low, Quantity, SPN

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