Posts Tagged: OBD2 P0108

What the P0108 Code Means and How to Fix It

P0108 Code Explained: What It Means, Common Causes, and How to Fix It Quick Summary The P0108 code means the engine computer is seeing an abnormally high voltage signal from the pressure-sensing system—specifically, a Manifold Absolute Pressure high input and/or a Barometric Pressure high input condition. In plain terms, the PCM believes intake or atmospheric pressure is much higher than it should be. The most common causes are wiring faults, sensor reference/ground problems, vacuum issues, or a failed sensor. Proper diagnosis focuses on live-data comparison, electrical checks, and vacuum verification—not … Read More