Before I figured out how to work on cars, onboard computer systems scared me. I’ve had no formal training, after all, so the idea of a car’s complex electricals and countless sensors made DIY work ...

Modern cars are basically computers on wheels. With so many electrical systems, sensors, and motors, there’s so much that could potentially go wrong. When something does go awry, pinpointing the ...

A request to borrow a car code reader raises the dilemma of borrowing from friends (credit: Gemini) A reader asks about the etiquette of a “borrowing policy” between friends. A friend asked to borrow ...