Quote Originally Posted by Z U L8R
That works on 95 and older cars aka obd (obd1 same thing u just don't say the 1, as it's understood)

96 and up are obd2, which require a scanner to clear the codes unless you let your car sit for months and months with a dead battery and even then they usually still have stored trouble codes. some mid production or late model 95's are also obd2, you just have to see if you have the obd2 connector or not if you own a 95.

everyone else who's obd typically relies on jumping diagnostic pins and counting blinks to pull a code, unless u got a gangsta ass scanner like we do ^_^
I have cleared codes on several OBD-II cars by removing the battery cables overnight. It has worked on everything I have tried it on.

Autozone will clear them in a few minutes for free, too.