I talk to many people that, armed with the code numbers read for free at parts stores , try everthing but go to a professional garage. By the time i often see them they have no money or time left after guessing. Those with good credit get another car and are lured by free tires for life,free maintenance ,free oil changes,etc by the dealers. With the average repair visit running $500.00 and up it's getting tough for our customer base to afford our help.That being said i still give them the best advice i can for the problem at hand even if i have to send then elswhere.