In my 35-plus years of working on cars, I have encountered nearly every frustrating troubleshooting problem in the book. Part of the issue stems from my affinity for old Jeeps and classic cars, which ...

Cummins’ 5.9L diesel engines have many wonderful traits, from the simplicity of their design to the durability and reliability of their internal components. However, the powerplants also have parts ...

Dear Doctor: I own a very low mileage 2000 Toyota Corolla with 37,400 miles. It is used mostly for local city driving. The “check engine” light came on and the code read “lean condition.” The mechanic ...

Some 2004-06 Mitsubishi Lancer models with 2.0-liter engines may run rough and illuminate the check engine light. When you hook up your scan tool, you may find trouble code P0171 (lean exhaust) stored ...