Volkswagen Check Engine Light Diagnosis

At some point in most VW owners life they will get a check engine light. For about the 4th time in my Passat’s life, the check
engine light came on. I would say that is pretty good for over 140,000 miles. The check engine light can come on for a ton of different reasons. Today I am going to walk you through my diagnostic process for check engine lights. At the start of the video, I did not know what was wrong with the Passat. You get to see exactly the point we find the issues.

Join me today as we discuss:

• Steps of check engine light diagnosis
• VCDS Vag-Com
• Sonic Tools 
• Vehicle safety evaluation
• Checking faults with VCDS
• Faults Stored
  P0507
  P1111
  P1136
  P0171
• What does “System lean”mean?
• What does “System Rich” mean?
• Using MVB 32 with VCDS
• Visual inspection
• Pocking around vacuum lines
• Clamping vacuum lines
• Why my MIL is on
• and more

Trouble viewing? Watch “Volkswagen Check Engine Light Diagnosis” on YouTube.com

As always, your questions and comments are welcome. If you have an idea for a show topic, please use the contact me form, or email me Charles(at)humble mechanic(dot)com

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