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OBDII Readiness Cycle.....it worked for me

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Old 10-16-2007, 08:47 PM
  #16  
cfdarch
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your method sure beats the stay under 3000rpm method...which is really difficult btw
Old 10-16-2007, 08:51 PM
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993inNC
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yeah, I don't think I was below 3000 the entire w/e My speeds varied though, thats for sure. Must be something about 150 mph that sets the codes
Old 10-16-2007, 10:51 PM
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cfdarch
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your bypass is a most beautiful object. if I had one my garage floor would be a mirror
Old 10-17-2007, 08:14 AM
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993inNC
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that's cool, thanks for the compliment
Old 10-17-2007, 03:35 PM
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Slow Guy
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Originally Posted by cfdarch
so simple minded me wonders...surely they don't expect to idle in gear with clutch depressed.....do they???

My annual sniff check is near and I have that certain orange light aglow.

Thanks in advance.
As MarkD also said you do NOT need to keep the clutch pedal depressed, just put it in neutral and let it idle.

I've used this process (BMW from ECobb) twice now and recommended it to others who've said it worked for them too.

I think ECobb posted the link in the DIY forum a few months ago.
Old 10-18-2007, 12:32 PM
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cfdarch
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thanks bill....perhaps we can share a cup of coffee again. As an update my CEL fired 20 miles after the test. I will be viewing orange for the next year or until Turbowerx comes to my rescue.

Cary
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Old 10-18-2007, 01:57 PM
  #22  
Slow Guy
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Originally Posted by cfdarch
thanks bill....perhaps we can share a cup of coffee again. As an update my CEL fired 20 miles after the test. I will be viewing orange for the next year or until Turbowerx comes to my rescue.

Cary
Thanks. Sounds like a good idea, maybe we can make it rain if we set a date?

You need a reader to see what code it's throwing?
Old 11-22-2007, 07:25 PM
  #23  
jimhsu
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Originally Posted by Jim_K
routine will be discontinued whenever:


Engine speed exceeds 3000 RPM
Large fluctuations in throttle angle
Road speed exceeds 60 MPH
Will the routine be only temporarily discontinued and then restarted when the conditions are achieved again, or will I have to start the whole thing all over again (or just restart the 3 min 15 sec, 15 mins, etc. that portion of the cycle that I just interrupted) if I go above 3000RPM or 60mph?

I seem to recall that it is just "on hold" during the times of exceeding the RPM or speed, but I am still trying to get the codes to set to ready after numerous informal "Italian tune-up" sessions with the guidelines in mind, and have set some but not set all to ready....
Old 09-28-2009, 07:45 PM
  #24  
Austin993
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I used the procedure above and successfully passed the Texas emissions test a few days after disconnecting my battery. Thanks for the advice.
Old 01-16-2019, 03:16 PM
  #25  
crb8783
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Originally Posted by Jim_K
Here is the procedure I followed (posted by ecobb993 on 10/18/03) under subject "failed california emissions".

Kary,

That was my entry in response to jstahmann's need to run through the "readiness cycle". Our ever diligent fed & state smog patrol made sure that their evil constituents don't try to fool them by reseting the emissions trouble codes and dashing to the inspection station for a quick read before they trigger again.

At the same time the OBDII cpu codes are reset, the "readiness codes" are also reset. The readiness code indicates whether each of the 8 system sensors have completed it's diagnostic check. So the inspection station doesn't see a trouble code but also sees that the readiness code is off (actually it reads more than "0").

Once the CE light is cleared the following readiness cycle can be followed to reset the code or you could drive the car for a while in a variety of situations that would allow each system to do it's thing:

Start engine, idle cold for approx. 2 min, 10 secs.

Accelerate to 20-30 MPH, Maintain steady speed for approx 3 min, 15 secs.

Accelerate to 40-60 MPH, Maintain steady speed for approx 15 mins.

Decelerate and come to a stop. Idle in gear for approx 5 mins.



Following the start engine phase the sequence of test conditions may interchange.

routine will be discontinued whenever:


Engine speed exceeds 3000 RPM
Large fluctuations in throttle angle
Road speed exceeds 60 MPH


Hope this helps y'all.

The route that I took did have some starts and stops in it, but as long as you follow the instructions not to exceed 3k rpm, don't make large throttle fluctuations and don't exceed 60 mph until complete, it worked (as least for me).

Good luck and let me know if there are any other questions.

I'll post some pics and details of my drive from BOS to ATL ASAP.

Regards.

Jim
I just picked up a '96 993 with the same issue. Was pulling my hair out trying to reset the readiness codes. There are quite a few drive cycle recommendations on multiple forums. None of them worked until I found this one. Worked like a charm. Thank you!!

Christopher
The following 2 users liked this post by crb8783:
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Old 10-28-2021, 11:06 PM
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imhighlander
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Long shot, but any idea if this is Porsche's standard process? I have this issue on my 2012 Panamera Turbo. Won't pass emissions because the catalyst is "not ready."
Old 04-10-2024, 07:23 PM
  #27  
911
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The beauty of Rennlist - the gift that keeps on giving. I'm going to try Jim's method tomorrow morning. I hope it works!
Old 04-10-2024, 08:19 PM
  #28  
Todynot
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In NJ inspections are required every two years, and my car almost always needs codes reset. So I’ve used this drive cycle many times and it works. That said, it usually takes multiple attempts to work. And stops and slow downs to take corners, etc, doesn’t impact the cycle.
Old 04-10-2024, 08:25 PM
  #29  
911
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Todynot -

Thanks for your response! It’s nice to know when things and certain methods work out. I will be doing this cycle tomorrow morning. I’ll let you know how it goes. Thanks, again, for verifying that this works!
Old 04-10-2024, 10:32 PM
  #30  
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Originally Posted by 911
Todynot -

Thanks for your response! It’s nice to know when things and certain methods work out. I will be doing this cycle tomorrow morning. I’ll let you know how it goes. Thanks, again, for verifying that this works!
For info about setting the 993 monitors for an emission test, read here under Porsche 993 Cycle Flag Basics; https://www.systemsc.com/codes.htm
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