P0108 on a Hyundai: 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 Hyundai
On a Hyundai, P0108 means the manifold absolute pressure (MAP) sensor signal is higher than the computer expects. Hyundai uses MAP sensors on most of its engines, and the reading helps the computer set fuel and ignition timing. A faulty sensor or a wiring short can make the engine idle rough or hesitate.
Is P0108 common on Hyundais?
Elantras, Sonatas, Accents, and Tucsons commonly throw P0108 after high mileage, usually because the MAP sensor fails or the connector corrodes. It is an easy, low-cost fix once the wiring checks out.
Commonly reported on: Elantra, Sonata, Accent, Tucson.
Symptoms
- Check engine light on
- Rough idle
- Hesitation when accelerating
- Reduced 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 | $25–70 |
| Clean and reseat the sensor connector | Yes | $5–15 |
| Have a shop replace the sensor and test the circuit | Mechanic | $110–210 |
Frequently asked questions
Other common Hyundai codes
P0108 on other brands
Looking for the full (non-brand-specific) guide? See the P0108 code page →
Browse all Hyundai codes: Hyundai hub →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.