+18 2012 Hyundai Sonata Check Engine Light References. Web when the check engine light in your hyundai sonata comes on after changing the battery, it’s typically due to the vehicle’s computer system resetting. Problems with the evaporative emissions control system 8.
When the engine’s one or more cylinders aren’t firing correctly, unburned fuel can enter the exhaust system and harm the catalytic converter. Repairpal will help you figure out whether it's your emissions system, sensor, catalytic converter, or something else. Loose or damaged gas cap 2.
