Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
P0108-Map Sensor Circuit High: Notes
- 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 .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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