P0108 on a Ford: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

Safe to drive, but the engine may hesitate, idle rough, and use more fuel until the sensor issue is fixed.

What P0108 means on a Ford

On a Ford, P0108 means the manifold absolute pressure (MAP) sensor circuit is reading a voltage higher than the computer expects. Ford uses MAP sensors on many engines, especially trucks and SUVs, and the reading helps set fuel and spark. A faulty sensor or shorted wiring is usually behind this code.

Is P0108 common on Fords?

F-150s, Explorers, and Rangers see P0108 fairly often, usually because the sensor fails or the engine harness rubs through near the intake. It is a common electrical fault, not a sign of major engine damage, and parts are inexpensive.

Commonly reported on: F-150, Explorer, Ranger, Mustang.

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: Chafed wiring harness near the intake
less common: Corroded or loose connector terminals

How to fix it

Fix	DIY?	Typical cost
Replace the MAP sensor	Yes	$30–80
Repair the chafed wiring or connector	Mechanic	$50–150
Have a shop replace the sensor and test the circuit	Mechanic	$120–220