Study Reveals The Most Common ‘Check Engine’ Issues And Repair Costs

LifestyleCars & BikesStudy Reveals The Most Common ‘Check Engine’ Issues And Repair CostsByJim Gorzelany,Senior Contributor.Forbes contributors publish independent expert analyses and insights. Jim Gorzelany is a veteran automotive journalist.Follow AuthorApr 22, 2026, 10:15am EDT--:-- / --:--This voice experience is generated by AI. Learn more.This voice experience is generated by AI. Learn more.The average age of all vehicles on the road is rising, as are their ensuing repair costs.gettyToday’s cars, trucks and SUVs are loaded with technology, none the least of which is an onboard diagnostic (OBD) feature that will alert a driver when a mechanical problem exists with the engine or emissions system.That’s when the feared “Check Engine” light illuminates on a vehicle’s instrument panel. With the average vehicle age on U.S. roads now up to nearly 13 years old, most motorists either have or will confront this important warning, which typically manifests as either the side outline of a car’s engine, or simply the words “Check Engine.” While it’s prudent to make an appointment with a trusted mechanic to have the problem investigated in the near future, should the Check Engine light be flashing – especially when accompanied by the temperature or oil warning – that indicates a serious problem that should be taken care of immediately to avoid the need for further and costlier repairs. While the warning light itself will not reveal exactly what the problem is, this is accomplished via a device called a code reader that plugs into a vehicle’s OBD port (which is usually located in the lower driver’s side of the dashboard). A local auto parts store will often perform a scan at no cost via a hand-held unit (also available for purchase) but a modern repair shop likely has a more-sophisticated diagnostic tool. That’s essential because today’s cars are packed with an array of complex computerized sensors.As the name implies, this device will upload one or more codes that refer...