Forum on radiator repair
If your check engine light shows up red however, you have a more serious situation on your hands. When this happens, you should get your vehicle off the road as soon as possible, in the safest way possible. Make sure that you do so as safely as possible however, as getting into a fender bender at this crucial juncture would only make your problems worse. A red check engine light means that you already have a pretty serious situation to deal with, and you certainly don't want to make things any worse by becoming involved in a pile up! In the case of a yellow or amber check engine light, the most common cause would be a malfunction in one of the electronic components of the engine. The yellow or amber check engine light is a warning sent by the faulty component to the PCM or power train control system.