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Volvo engine code DTC P229F
NOx Sensor #2: Emission Threshold The rationality check for this sensor consists of sensor stuck low and stuck high check. It is performed whenever the engine operates on highly transient conditions. A fault condition is reached whenever the NOx sensor values are below or above a fault limit. P229F NOx Sensor #2: Rationality Low Monitor DTC P229F 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 DTC To Be Set 300 seconds MIL Illumination 2 Drive Cycles