Miles before check engine light reset

[JFP in PA]

Yes, I own a shop; we do this all the time. Once the car has been properly repaired, and the code(s) has been cleared, it should pass inspection immediately; no waiting or miles are required.

[Topless]

Ummm,

After a battery disconnect or repair/code reset the car may need some miles to put the DME in "ready" state. I replaced my MAF a few years ago, reset the codes and went to get a smog cert. The operator said it was not in "ready" state and could not be tested until I had logged 30-50 miles. The same is true of a car that has been stored for winter with battery removed.

Relevant thread:
http://www.renntech.org/forums/index.php?/topic/19983-02-boxster-s-does-not-pass-emissions/

[JFP in PA]

You are correct, but what I a saying is that a shop can pass the car before the DME resets (I/M Readiness) under their discretion if they feel the problem for that specific code has been corrected. The DME still has to run the cycles before it totally resets to "Ready". But if you clear the codes by disconnecting the battery, the I/M Readiness test will show "not ready" for all the sensors the I/M test checks, and then no reputable shop will pass the car until the DME fully resets....