Group 28 Troubleshooting MID 128 PID 102 Intake Manifold Pressure 21 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 0 • Data valid but above normal operational range • Intake Manifold Pressure Sensor output is high • Intake Manifold Pressure is indicating an unphysical value • Engine derate • Malfunction indicator lamp illuminated • Variable Geometry Turbo (VGT) actuator stuck • Faulty Intake Manifold Pressure Sensor harness • Intake Manifold Pressure Sensor failure FMI 1 • Data valid but below normal operational range • Intake Manifold Pressure Sensor is indicating an unphysical value • Engine derate • Malfunction indicator lamp illuminated • Intermittent fault in the Intake Manifold Pressure Sensor harness • Faulty Boost Air Pressure connector • Intake Manifold Pressure Sensor failure FMI 2 • Data erratic, intermittent or incorrect • Intake Manifold Pressure Sensor output is too high or too low • Engine derate • Malfunction indicator lamp illuminated • Intermittent fault in the Intake Manifold Pressure Sensor harness • Faulty Boost Air Pressure connector • Intake Manifold Pressure Sensor failure FMI 3 • Voltage above normal or shorted to high source • A short to battery in the metering circuit • An open in the ground circuit of the Intake Manifold Pressure Sensor • Engine derate • Malfunction indicator lamp illuminated • Intermittent fault in the Intake Manifold Pressure Sensor harness • Faulty Boost Air Pressure connector • Intake Manifold Pressure Sensor failure FMI 5 • Current below normal or open circuit • A short to ground in the harness • An open in the 5 volt supply circuit • An open in the metering circuit • Engine derate • Malfunction indicator lamp illuminated • Intermittent fault in the Intake Manifold Pressure Sensor harness • Faulty Boost Air Pressure connector • Intake Manifold Pressure Sensor failure FMI 11 • Root cause not known (Data Incorrect) • Intake Manifold Pressure Sensor output is too high or low • Engine derate • Malfunction indicator lamp illuminated • Faulty Intake Manifold Pressure Sensor harness • Inlet air leakage • Intake Manifold Pressure Sensor failure