P0108 Fault Code Explanation for 2010 VW Jetta - Linked to A/C Belt and Water Pump Replacement?
I recently replaced the water pump and both A/C belts on Wednesday. On Thursday, the check engine light activated, and the diagnostic scan revealed fault code P0108 — Manifold Absolute Pressure/Barometric Pressure Circuit High Input. Given that these mechanical repairs occurred just days prior, I'm wondering if there could be a connection between the work done and this error. The timing makes me suspect a possible link, though I want to confirm whether such issues are typically associated with belt or pump replacements.
While it's possible, the troubleshooting process remains similar. Check the voltage at the MAP sensor and verify the vacuum source — a loose connection or faulty wiring could be the root cause.