Chosen Solution
My 2002 Jettas check engine light is on and when I scanned it it reads ‘‘Internal module checksum error" What does this mean and how do I fix it?
Possible causes • Faulty Powertrain Control Module (PCM) • Powertrain Control Module (PCM) harness is open or shorted •Powertrain Control Module (PCM) circuit poor electrical connection •Low battery voltage Read more: https://www.engine-codes.com/p0601_volks…
