P0108-Map Sensor Circuit High: Notes

Fig 1: Manifold Absolute Pressure Sensor Circuit Schematic

Courtesy of CHRYSLER LLC

When Monitored : Engine running for at least 30 seconds and no fault in the throttle valve actuator.
Set Condition : Low limit: The Manifold Absolute Pressure (MAP) Sensor reading is 0 mbar (0 in. Hg) when the throttle valve angle is greater than 80° for approximately 5 seconds. High limit: The MAP Sensor reading is greater than a calculated value that is determined by engine speed and throttle valve angle for approximately 5 seconds.

Possible Causes

MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT OPEN

MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND

MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE

5 VOLT SUPPLY CIRCUIT OPEN

5 VOLT SUPPLY CIRCUIT SHORT TO GROUND

5 VOLT SUPPLY CIRCUIT SHORT TO VOLTAGE

MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIRCUIT

MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL CIRCUIT SHORT TO 5 VOLT SUPPLY CIRCUIT

SENSOR GROUND CIRCUIT OPEN

ENGINE OIL SENSOR

MANIFOLD ABSOLUTE PRESSURE SENSOR

POWERTRAIN CONTROL MODULE

For a complete Powertrain Control Module Circuit Diagram, refer to SCHEMATICS AND DIAGRAMS .