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Volvo engine code DTC P0406
EGR Differential Pressure Sensor: Circuit Monitors The EGR Differential Pressure Sensor is checked for electrical failures by monitoring the analog-to-digital(A/D) input voltage. P0406 EGR Differential Pressure Sensor: Short Circuit High DTC P0406 Component / System DP Sensor - High Monitor Strategy Description Short Circuit High Fault Limit Sensor Voltage > 4.8 V Enable Conditions • Key On Active • Battery Voltage > 8 V Disable Conditions No Active DTC's: • N/A Time Required For DTC To Be Set 5 seconds MIL Illumination 2 Drive Cycles