The average cost of diagnosing a check engine light problem in the US is between $50 and $200. The exact cost will depend on the make and model of the vehicle, the severity of the problem, and the repair shop you take it to. Some common causes of check engine light problems include:
- Faulty oxygen sensor
- Loose gas cap
- Catalytic converter failure
- Spark plug failure
- Evaporative emissions system leak
If you see a check engine light, it's important to have it diagnosed as soon as possible to avoid further damage to your vehicle.
