Check Engine Code
P0108
Manifold Absolute Pressure (MAP) Sensor Circuit High Input
What P0108 means
P0108 means MAP voltage is stuck high — usually a failed sensor or a wiring short. Can also be set if the sensor lost its vacuum reference (hose off).
Symptoms
- CEL
- Rich running
- Black smoke
- Rough idle
Likely causes (most common first)
- Failed MAP sensor
- Disconnected vacuum line to the sensor
- Wiring short to 5V reference
- Severe vacuum leak elsewhere
Can I keep driving?
Medium — drivable but fix soon
Typical repair cost
DIY fixes can start near $20 (parts only). Shop repairs for P0108 typically run up to $250 depending on the underlying cause and vehicle. Start with the most common cause — Failed MAP sensor — before throwing parts at it.
Symptoms that match P0108
If you got here from a search query, one of these might describe what your car is actually doing:
Recommended parts & tools for P0108
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