DESCRIPTION:
This fault code sets when the difference between the expected NOX ppm and the actual NOx ppm is greater than 200
ppm.
MONITORED PARAMETER:
Aftertreatment inlet NOx sensor.
TYPICAL ENABLING CONDITIONS:
General Enabling Conditions: Engine is not in regeneration and operating at high speed and loads.
Engine Parameter:
1. Engine Speed (rpm)
– Min: 1350– Max 1600
2. Torque (Nm):– Min: 1100– Max: 1500
3. Battery Voltage (Volts):– Min: 11.08
4. Engine Coolant Outlet Temperature:– Min: 70°C (158°F)
5. Ambient Temperature– Min: -8°C (17.6°F)
6. Barometric Pressure (mbar):– Min: 755
7. Time Since DPF Regeneration (min.):– Min: 15
MONITOR SEQUENCE:
None
EXECUTION FREQUENCY:
Continuous when enabling conditions met.
TYPICAL DURATION:
150 seconds (2 cycle)
DASH LAMPS:
MIL
ENGINE REACTION:
None
VERIFICATION:
1. Warm up the engine and ensure engine is not in regeneration mode
2. Drive a fully loaded trailer on highway and maintain above enabling conditions for 150 seconds.
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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