30-60 seconds will not clear the PCM, I don't know what cars you work on, but thats not enough time to discharge the PCM.

 

I work on late model Dodge trucks, and ONLY late model Dodge trucks. What is this thread about? Oh yeah, a LATE MODEL DODGE TRUCK!!! Maybe YOU are the person who is in the WRONG THREAD??? 60 seconds is all it takes for the PCM memory to clear.

 

This is really kind of pointless, but you are the 1st person I know of that can get codes to clear in 60 seconds. Maybe the PCMs just are scared of you and forget their codes, lol.