Detroit DD13 EPA10 (2010-13) Fault Code: SPN 3226 FMI 2 (ACM) Selective Catalyst Reduction Outlet NOx Sensor – Drift
DESCRIPTION:Outlet NOx sensor is drifted.
MONITORED PARAMETER:1. Selective catalyst reduction (SCR) outlet NOx.2. Engine speed between 1000 to 2000 rpm.3. Engine load between 25 to 100%.
TYPICAL ENABLING CONDITIONS:1. SCR temperature greater than 390°C (734°F) for 10 seconds.2. Inlet NOx to outlet NOx deviation greater than 200 ppm.
MONITOR SEQUENCE:Once per drive cycle.
EXECUTION FREQUENCY:Continuous when enabling conditions met.
TYPICAL DURATION:20 seconds
DASH LAMPS:None
ENGINE REACTION:Dosing is disabled.
VERIFICATION:Parked regeneration
NOTE: If any other EGR codes are active, fix those first.
PROBABLE CAUSES:1. Check the aftertreatment system for leaks/damage.2. Perform a high idle regeneration with the metering valve or dosing unit disconnected.
