Q: My 1999 Pontiac Sunfire coupe is doing something something I can't easily explain. The car has 240,000 km on it and it has the stock engine, although I think I bought it with a K filter charger.

Car owners dread few things quite as much as a vehicle's "Check Engine" light. However, the dreaded signal doesn't always foretell a worst-case scenario for motorists. They can even help prevent ...