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Recommended Posts

My California 02 996 wouldn’t  pass the smog check because the tech got a 
“ monitors were not ready” signal. I’ve tried to run the prescribed adaptive drive cycle. (What a pain that is.)

Now I’m wondering whether my Durametric software will tell me if my PMC has reset and I can try the smog test again. 
Thanks for any input.

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The simple  answer is yes, Durametric will tell you the status of the smog monitors.  Sometimes it works better to disconnect the negative battery lead, wait 20 minutes, re-connect then do the 30-60 minutes of drive time to re-establish all the ECU/DME monitors.  There are some detailed threads on what other people did regarding the drive time and getting all the smog monitors good to go.

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  • Moderators

First of all, the 2000 - 2002 cars are well known for requiring long drive cycles before resetting the I/M Readiness monitors, having to drive 200 or more miles is common.


Second, disconnecting the battery will take you back to zero; the monitors in question will have to start all over again if you do that.

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  • 2 weeks later...

I can confirm what JFP says.  It’s been many years but I recall very clearly on a 2002 911 C4S after replacing cats/o2s having to drive many miles until the readiness state would go to OK (and I could go get my emissions sticker).  Durametric will only tell you the status of the states; it can not speed up the process of resetting/correcting the readiness states.  

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  • 1 month later...

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