P0108 Code: Manifold Absolute Pressure Sensor Circuit High
🟠 Moderate severity · drivable
You can usually drive, but the engine may run lean and hesitate until the fault is fixed.
What P0108 means
The MAP sensor voltage is too high, meaning the computer sees a signal above the expected range. A short to power in the wiring or a failed sensor are common causes. The engine may run lean, idle rough, or hesitate.
Symptoms
- Check engine light on
- Engine runs lean or hesitates
- Rough idle
- Poor fuel economy
- Reduced power
Common causes
- most common: Faulty MAP sensor
- common: Wiring shorted to power in the MAP circuit
- less common: Poor ground connection
- less common: Corroded connector
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the MAP sensor | Yes | $40–120 |
| Repair the wiring short to power | Yes | $20–80 |
| Repair the sensor ground | Yes | $10–50 |
| Clean the connector | Yes | $0–20 |
Frequently asked questions
Can I drive with P0108?
Yes, but the engine may run lean and hesitate. Fixing it soon avoids extra strain on the engine.
What is the difference between P0107 and P0108?
P0107 is a low signal and P0108 is a high signal. Both are MAP circuit faults; high voltage often means a short to power.
How much does a MAP sensor cost?
Most MAP sensors cost $40 to $120. Replacing one is usually easy on vehicles where it sits on top of the intake.
Related codes
P0105
P0105 Code: Manifold Absolute Pressure Sensor Circuit
P0106P0106 Code: Manifold Absolute Pressure Sensor Range/Performance
P0107P0107 Code: Manifold Absolute Pressure Sensor Circuit Low
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.