For example, the average cost to repair a check engine light issue in the U.S. was $384 in 2019, up just 1% from the previous year.

The costliest check engine-related repair in CarMD’s database is a complete engine replacement at $7,150. Other most-expensive repairs involve replacing the electronic power steering control ...

Here are the 10 most common check engine-light problems in the U.S., and what each, on average, will cost to repair: Replace catalytic converter (s): $1,376 Replace oxygen sensor (s): $246 ...