Popular repair tips from the Car Doctor
Buying a scan tool
Years ago scan tools and even code readers were quite costly; today they have come down in price considerably. There are several code-readers that can read and erase fault codes for less than $75. But if I were shopping for an inexpensive tool, I would look for one that not only reads codes but also determines if the various emissions monitors have been set. This is a handy feature if you have performed a repair to pass a state emissions inspection test.