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Volvo engine code DTC P04D9
EGR: Feedback Saturation This OBD monitor indicates if the burned air fraction error is saturated against a high or low limit. The logic for the monitor evaluates the time spent at saturation and compares the ratio between the time spent in a saturation mode and the total time with engine running. A fault is reported whenever the ratio exceeds the fault limit. P04D9 EGR System: Feedback Control (Saturated Low) DTC P04D9 Component / System EGR System - Feedback Control Monitor Strategy Description Saturated low: Difference between demanded and calculated burned air fraction Fault Limit Ratio = Time spent saturated low total time > 0.9 Enable Conditions • Engine Torque 300 - 2500 Nm • Exhaust Mass Flow 0.1 - 1.0 kg/s • Ambient Air Temperature -8 - 55 °C • Barometric Pressure 75 - 105 kPa • Coolant Temperature > 65 °C Disable Conditions No Active DTC's: • P0069, P046C, P0234, P0299, P0401, P0402 Time Required For DTC To Be Set 90 Seconds MIL Illumination 2 Drive Cycles Probable Causes See Tech Tool P04DA EGR System: Feedback Control (Saturated High) DTC P04DA Component / System EGR System - Feedback Control Monitor Strategy Description Saturated high: Difference between demanded and calculated burned air fraction Fault Limit Ratio = Time spent saturated high total time > 0.9 Enable Conditions • Engine Torque 300 - 2500 Nm • Exhaust Mass Flow 0.1 - 1.0 kg/s • Ambient Air Temperature -8 - 55 °C • Barometric Pressure 75 - 105 kPa • Coolant Temperature > 65 °C Disable Conditions No Active DTC's: • P0069, P046C, P0234, P0299, P0401, P0402 Time Required For DTC To Be Set 90 Seconds MIL Illumination 2 Drive Cycles