The “CHECK ENGINE” light comes on when your vehicle’s On-Board
Diagnostics computer finds a problem that may affect emissions.
Problems can range in severity from a loose gas cap, which wastes fuel
and causes pollution, to an engine misfire, which may cause permanent
damage. In any case, there is no need to panic. Most of the time, it’s
just the vehicle’s computer telling you to get it looked at soon.
Always reference your vehicle’s service manual for what to do when your
“CHECK ENGINE” light comes on.