Detroit DD15 GHG14 (2014-16) Fault Code: SPN 4364 FMI 18 (ACM) SCR NOx Conversion Efficiency Low

DESCRIPTION:
This code sets when the Aftertreatment Control Module (ACM) detects that the Selective Catalyst Reduction (SCR) NOx conversion efficiency is low.

MONITORED PARAMETER:
1. SCR inlet NOx sensor.
2. SCR outlet NOx sensor.

TYPICAL ENABLING CONDITIONS:
1. Diesel Exhaust Fluid (DEF) dosing enabled.
2. 1000 to 2100 rpm.
3. 15 to 100% load.

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
30 minutes

DASH LAMPS:
MIL

ENGINE REACTION:
None

VERIFICATION:
Parked regeneration

NOTE: If any 3364-xx codes present, fix those first.

PROBABLE CAUSES:
1. DEF tank contaminated (fuel, water, etc…).
2. DEF pressure sensor failure.
3. DEF pressure sensor connector/harness.
4. Perform stationary regen.
5. DEF air supply lines cracked/leaked/kinked.

Categories DD15 GHG14 (2014-16), Detroit, DTC TRUCKS Tags 16, 18, 2014, 4364, ACM, Code, Conversion, DD15, Detroit, Efficiency, Fault, FMI, GHG14, Low, NOx, SCR, SPN

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