Volvo engine code DTC P046C

EGR Differential Pressure Sensor: Rationality Monitor This OBD monitor diagnoses the EGR differential pressure sensor. There are two methods for monitoring the EGR differential pressure sensor: Normal Flow Condition: This monitors the deviation between estimated EGR differential pressure and the measured EGR differential pressure value. Zero Flow Condition: This monitors when the EGR differential pressure is supposed to be zero when the EGR valve closed. P046C EGR Differential Pressure Sensor: DP Sensor Rationality DTC P046C Component / System DP Sensor Rationality Monitor Strategy Description Compare actual vs estimated EGR delta pressure Fault Limit Plausibility Actual EGR delta pressure - estimated EGR delta pressure Low High Low < -20 kPa High > 20 kPa Zero EGR delta Pressure Low < -2 kPa High > 3 kPa Enable Conditions Plausibility • Engine Speed 1100 - 1800 RPM • Engine Torque > 1600 Nm • EGR Position > 5% • VGT Position 40 - 92% Zero • Engine Speed 0 - 1500 RPM • EGR Position < 0.1% Disable Conditions No Active DTC's: • N/A Time Required For DTC To Be Set Plausibility 30 seconds Zero 3 seconds MIL Illumination 2 Drive Cycles