Radiator service and many more topics
Your check engine light can go on for reasons as minor as a loose gas cap or as major as a malfunctioning engine. Usually a check engine light indicates that your cars onboard diagnostics check has discovered an improperly working component somewhere that could permanently damage your system if left unrepaired. Do not ignore an illuminated check engine light. In late model cars, the check engine light behaves differently depending on the severity of the problem. If your check engine light starts blinking or turns red, the issue is so critical that immediate attention is needed.