Code Reader...where to get & how much?
Assuming this is related to your other 'smog' post, the scanner will clear the pending codes but they will come back almost immediately because the underlying problem has not been fixed. It could be plugs, coils, MAF, O2 sensors or catalytic convertors gone bad. Most of which are fairly expensive repairs. The seller is responsible for providing a valid smog certificate less than 90 days old at time of sale which will allow you to register the car.
Autozone and Kragen used to do it for free but I heard they stopped so you might call them.



