If you drive you should have this app on your phone.
This app indicates whether you can safely continue to drive, or are required to seek immediate assistance.
App is very helpful for those who do not know much about cars, it contains over 478 warning lights, their description and advice how serious is the problem.
This site helps identify problem with your car, how serious it's. You could be able to handle any problem your car might experience. Knowing the basic of your car and understanding your car's problems, will reduce repair cost.