P0108 on a Mazda: Causes, Fixes & Repair Cost
🟠 Moderate severity · drivable
Safe to drive, but the engine may idle rough, hesitate, and use more fuel until the sensor is fixed.
What P0108 means on a Mazda
On a Mazda, P0108 means the manifold absolute pressure (MAP) sensor is reporting a higher voltage than the computer expects. Mazda uses MAP sensors on several engines, including the 2.3L four-cylinder found in models like the Mazda6. A faulty sensor or shorted wiring can cause rough idle or hesitation.
Is P0108 common on Mazdas?
Mazda6, Mazda3, and CX-5 models can see P0108, usually from the sensor failing or the connector corroding. It is a sensor-circuit fault, not a mechanical problem, and the parts are inexpensive.
Commonly reported on: Mazda6, Mazda3, CX-5, CX-7.
Symptoms
- Check engine light on
- Rough idle
- Hesitation when accelerating
- Worse fuel economy
Common causes
- most common: Faulty MAP sensor
- common: Signal wire shorted toward 5 volts
- common: Corroded or loose connector terminals
- less common: Damaged wiring near the intake manifold
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the MAP sensor | Yes | $30–80 |
| Clean and reseat the sensor connector | Yes | $5–15 |
| Have a shop replace the sensor and test the circuit | Mechanic | $120–230 |
Frequently asked questions
Other common Mazda codes
P0108 on other brands
Looking for the full (non-brand-specific) guide? See the P0108 code page →
Browse all Mazda codes: Mazda hub →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.