P229F Fault Code

P229F NOx Sensor #2: Rationality Low Monitor

Component / System

NOx Sensor #2 - Plausibilty

Monitor Strategy Description

Sensor Rationality Check

Fault Limit

NOX Sensor rate of change < 0.7 ppm/sec

Enable Conditions

Engine Speed > 1200 RPM
Average Catalyst Temperature 200 - 500 °C
Engine Torque > 1800 Nm
Ambient Air Temperature -7 - 40 °C
Barometric Pressure 75 - 105 kPa
Coolant Temperature > 65 °C
Filtered Torque Rise > 60 Nm

Disable Conditions

No Active DTC's:
P225D, P0400, P0402, P225F, P242A, P0421, P225C, P2201, P221A

Time Required For P229F DTC To Be Set

300 seconds

MIL Illumination

2 Drive Cycles

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Don't forget ! When a fault code pops up, Volvo's Uptime Center is automatically notified via an cellular link, and it alerts the truck's owner by prearranged methods, usually email or phone calls.