So, I've had dashboard lights on now for sometime. ABS and the swerve sign. My error checker and VW says that it's either a sensor issue or a electrical fault. I've also had the exhaust light come on and off at times, not sure why, but it's fine. I don't know which it is, sensor or electrical fault. So, what should I do? The lights come on and off, but seem to be on far more now.