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Volvo engine code DTC P0234
Boost Pressure: Under or Over Boost Emission Threshold This OBD monitor is designed to detect under or over boost conditions. A modeled version of boost pressure is calculated continuously from a map based on engine speed and torque. The modeled boost pressure is compared to the actual value read from the boost pressure sensor. A DTC is raised if the threshold is reached. Under Boost: Threshold < (Actual boost pressure - Modeled boost pressure) Over Boost: Threshold > (Actual boost pressure - Modeled boost pressure) P0234 Boost Pressure: Overboost DTC P0234 Component / System Boost Pressure - Overboost Monitor Strategy Description Comparison of actual boost pressure to a modeled boost pressure Fault Limit Delta = Actual boost pressure - Modeled boost pressure > 120 kPa Enable Conditions • Engine Speed 1350 - 1700 RPM • EGR Position 10 - 96% • VGT Position 5 - 90% • Ambient Air Temperature -8 - 55 °C • Barometric Pressure 75 - 105 kPa • Coolant Temperature > 65 °C Disable Conditions No Active DTC's: • P0069, P0726, P0106, P0490, P045F, P045E, P2563, P0045, U010C, U040D, P2578, P2581, P2580, P0069, U010C, P2229 Time Required For DTC To Be Set 5 Seconds MIL Illumination 2 Drive Cycles