Originally posted by DemonSVT:

Yes OBD-II tracks PCM reset until it passes 3 full driving cycles. (I.E. not short trips)



I've had all of the readyness tests complete in only 2 driving cycles. I'm pretty sure that it's possible that they could complete in one driving cycle.

For those who don't know, the readyness tests will show up as incomplete after the codes are cleared or the battery is disconnected, until such time as the computer can run them. These tests check various sensors and components of the fuel injection and emissions control systems.

The readyness tests being incomplete is how the emissions testers know that you cleared the codes or disconnected the battery.