If your check engine light is illuminated, it’s best to bring it in for diagnostic testing. Because while the lights vary in appearance from vehicle to vehicle they all have the same basic meaning: There’s a problem with the car’s emissions system. The on-board diagnostics system and engine control unit are in charge of monitoring a bunch of different parameters and if they get a reading that’s a little out, up pops the check engine light. The list of things that can trigger the check engine light is pretty lengthy. For example, anything from a loose gas cap to a faulty fuel injector can be to blame but once connected to our engine diagnostics system we will be able diagnose the problem in no time.