The odor is caused by a buildup of a fungus on the evaporator core. That fungus is related to the kinds of fungus that cause athlete’s foot and jock odor.

Some of the most difficult diagnostic problems seem to involve vehicle computer operating strategies.

Welcome to the latest installment in our multi-part series on exhaust gas analysis.

Do you really know all the ins and outs of every system? Can you diagnose the really tough ones? If you can, do you know what is happening and why?