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Detroit DD16 GHG14 (2014-16) Fault Code: SPN 3216 FMI 10 (MCM) Selective Catalyst Reduction Inlet NOx Sensor – Drift

DESCRIPTION:
High NOx at idle.

MONITORED PARAMETER:
NOx

TYPICAL ENABLING CONDITIONS:
1. Zero vehicle speed.
2. RPM less than 900.
3. EGR closed.

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
Two seconds

DASH LAMPS:
MIL

ENGINE REACTION:
None

NOTE: If any other EGR codes are active, fix those first.

PROBABLE CAUSES:
1. Inspect the entire air inlet system, charge air cooler, and EGR piping/hoses.
2. Check for failed injector.
3. Check the aftertreatment system for leaks/damage.
4. Perform a high idle regeneration.

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