09/10/2026
Most US auto shops charge about $120 to $180 for a general vehicle diagnostic, while check-engine-light diagnosis can run roughly $120 to $230. More complex electrical, intermittent, or multi-system problems may cost more because they require additional technician time and testing. The diagnostic fee usually covers finding the cause of the problem, not the repair itself. Learn more in our blog.
Learn how much auto shops charge for diagnostics, average 2026 fees, check engine light costs, what testing includes, and why diagnostic prices vary.