P0108 on a Volkswagen: Causes, Fixes & Repair Cost
🟠 Moderate severity · drivable
Safe to drive, but the engine may idle rough, hesitate, or lose power until the sensor issue is fixed.
What P0108 means on a Volkswagen
On a Volkswagen, P0108 means the manifold absolute pressure (MAP) sensor on the intake manifold is reporting a higher voltage than expected. VW uses MAP sensors on many engines, including turbocharged ones, and the signal helps the computer manage fuel and boost. A bad sensor or wiring can cause rough idle, hesitation, or a loss of power.
Is P0108 common on Volkswagens?
Jettas, Golfs, and Passats see P0108 from time to time, usually from a failing sensor or a harness issue in the engine bay. On turbo models, a boost leak can also upset the readings, so a quick pressure check is worth doing during diagnosis.
Commonly reported on: Jetta, Golf, Passat, Tiguan.
Symptoms
- Check engine light on
- Rough idle
- Hesitation or reduced power
- Worse fuel economy
Common causes
- most common: Faulty MAP sensor
- common: Signal wire shorted toward 5 volts
- common: Boost or vacuum leak upsetting the reading
- less common: Damaged wiring or connector in the engine bay
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the MAP sensor | Yes | $40–100 |
| Fix a boost or vacuum leak | Yes | $20–80 |
| Have a shop diagnose and replace the sensor | Mechanic | $150–280 |
Frequently asked questions
Other common Volkswagen codes
P0108 on other brands
Looking for the full (non-brand-specific) guide? See the P0108 code page →
Browse all Volkswagen codes: Volkswagen hub →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.