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Today I will be taking your automotive questions. If you have a question about a car, car repair, DIYs on your car, Volkswagen, mechanic’s tools, or anything car related, ask it up. If you have a car question for a show like this, email me Charles(at)Humblemechanic(DOT)com.  Be sure to put the phrase “Question for Charles” in the subject. That is the best way to avoid the spam monster. If you don’t get your question on this show, email it again just to be sure.

Sponsor of the Day

CRP AUTOCRP deals in a ton of OE automotive parts. They also make the factory DSG fluid for VW. Having them as a sponsor will give us access to more information about fluids than I would ever get from VW. I am really excited to have them as a resource of information. To learn more about the great products they have, check out CRPAutomotive.com

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Many of you have asked about supporting the show. For that I thank you. For now, the best things you can do are SHARE THE SHOW, and shop with my links on Amazon. You will not spend any more money that you would normally. Here is the Amazon link ~ Humble Mechanic on Amazon or you can check out some recommended tools I have listed below.

Join me today as I answer your questions on:

  • Supporting modifications with a GTI Tune
  • Are MK7 Clutches weak?
  • Worrying about making mistakes as a mechanic
  • Cylinder head damage and system lean faults
  • What Does System Lean Mean?
  • Volkswagen Check Engine Light Diagnosis
  • Audi A4 vibrations on acceleration
  • Idle speed regulations with REVO Tune
  • Do you need to retorque lug nuts after 200 miles?
  • and more


Trouble viewing? Watch “Viewer Automotive Questions ~ Podcast Episode 141” on YouTube.

As always I love to hear your thoughts. Please post them in the comments section below. Again, if you have a question for a show like this, email me Charles(at)humblemechanic(dot)com with Question for Charles in the subject. Also if you have an idea for a show you can email me, or use the contact me form!

Don’t forget to follow me at:

What The Heck Is SYSTEM LEAN? No one likes when the check engine comes on in their car. One of the more common issues with check engine lights is a system lean fault P0171 is the most common fault code. This fault can be tricky to diagnose if you don’t understand what system lean really means. This can be too much air, or not enough fuel at the engine. System lean is not hard to diagnose, once you understand it.

Join me today as we discuss:p0171 system lean

  • One of the most asked questions I get
  • Perception of unmetered air/not enough fuel
  • Calculation based on feedback from sensors
  • How does it happen
  • O2 sensor voltage
  • Correction by ECM
  • VCDS Reading
  • VCDS Demo
  • System Rich VS System Lean
  • Diagnose system lean on my Passat
  • and more


Trouble viewing? Watch “What Does SYSTEM LEAN Mean For Your Car” on YouTube.

As always I love to hear your thoughts. Please post them in the comments section below.  Also if you have an idea for a show you can email me, or use the contact me form!

Don’t forget to follow me at: