Get To Know Your Car

An OBDII reader for your car. Find out what your check engine light means before taking your car to the mechanic. $20-$30 on Amazon. Some mechanics will take advantage of you if you don’t know anything about cars. If you go into a mechanic and you have already diagnosed the problem, then they may not try to tell you that you need other work done. 

Of course, sometimes you actually do need other work done, so make sure you go to someone who is trustworthy. Reddit User: PorkRoll4Initiative