Detroit DD15 GHG14 (2014-16) Fault Code: SPN 3226 FMI 4 (ACM) Selective Catalyst Reduction Outlet NOx Sensor Circuit Failed Low
DESCRIPTION:
This code sets when there is a short to ground on the SCR outlet NOx circuit between the sensor and CPU.
MONITORED PARAMETER:
SCR outlet NOx sensor.
TYPICAL ENABLING CONDITIONS:
Dewpoint enabled
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Continuous when enabling conditions met.
TYPICAL DURATION:
Two seconds
DASH LAMPS:
1. MIL
2. CEL
ENGINE REACTION:
None
VERIFICATION:
Parked regen
NOTE: If occurrence counter 5 or less, clear codes and return vehicle to customer.
PROBABLE CAUSES:
SCR outlet NOx sensor.
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