It’s been asked of every new mechanic for more than a century. Does it matter in 2025?

Diagnosing a catalytic converter isn’t always the most straightforward process simply because it’s so far downstream from other parts that affect its operation. You might watch this video and say, “Of course!”, but not every technician has been given the proper education on what else a converter efficiency code just might mean. Take a look as Nick and Lemmy share some of their tips for hashing out what might be causing that P0420.
Want to make your vehicle last? Not sure how to talk to a shop about car repairs? Nick and Lemmy offer their five top recommendations.
Ready to grow your shop’s business with fleet maintenance, service and repairs?
Do you have a toolbox ready to go for repairs on the road? What do you keep in it?
Not so long ago, forced induction was mostly limited to high-performance sports cars and diesel trucks. Join Lemmy and Nick for a deep dive into modern forced induction systems and the parts that keep them running.
Learn how stop drilling can help to prevent cracks from propagating with a little know-how and a drill.
The articles and other content contained on this site may contain links to third party websites. By clicking them, you consent to Dorman’s Website Use Agreement.
Participation in this forum is subject to Dorman’s Website Terms & Conditions. Please read our Comment Policy before commenting.