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SES light/ O2 simulators

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Old 01-20-2004, 12:08 PM
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Default SES light/ O2 simulators

I posted this in the newbie section, but I'd like a bit more feedback...

I put an ORY on my car a few months ago. At the time I didn't have OBDII oxygen simulators. As expected, the SES light came on.
Now that I have the O2 sims on, the light is not turning off. Should it or do I need to have a trouble code deleted from my PCM?
Should I reset the PCM?
Is there any relatively simple way to verify a simulator is functioning properly?

Thanks!
Old 01-20-2004, 12:26 PM
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you will have to go to a shop that is OBD-2 capable and have them clear the codes for you. otherwise the light will stay on until the computer doesn't see the problem after you cycle the key quite a few times. i htink it's like 30 or 50 times. it's easier and less annoying to just have them cleared.
Old 01-20-2004, 12:28 PM
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Thanks blue. That's good news. There's still hope that the O2 sims are working.
Old 01-20-2004, 05:23 PM
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Originally Posted by blue by you
you will have to go to a shop that is OBD-2 capable and have them clear the codes for you. otherwise the light will stay on until the computer doesn't see the problem after you cycle the key quite a few times. i htink it's like 30 or 50 times. it's easier and less annoying to just have them cleared.
This is exactly right. It's going to take a lot of time before the light goes away, unless you clear the codes yourself.

You don't need to go to a shop though. All you need to do is disconnect your battery.
Old 01-20-2004, 06:17 PM
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not necessarily. i am a tech at a GM dealership and while disconnecting the battery will sometimes erase the codes, it does not always work. but it doesn't hurt to try. good luck!
Old 01-20-2004, 07:03 PM
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Originally Posted by blue by you
not necessarily. i am a tech at a GM dealership and while disconnecting the battery will sometimes erase the codes, it does not always work. but it doesn't hurt to try. good luck!
Never heard or seen that before. What type of a DTC is the PCM able to hold without a power source? If you don't leave the battery disconnected long enough, sometimes the code will still be present.....
Old 01-20-2004, 08:17 PM
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autozone clears codes and pulls them for free. they are all over round here.
Old 01-21-2004, 12:03 PM
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Thanks a lot for all the information! I'll look into AutoZone or the local dealer to get these cleared.
Old 01-21-2004, 12:34 PM
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Do it yourself. Just do a search for resetting the PCM and follow the directions. It works, I have done it before.
Old 01-21-2004, 12:36 PM
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The dealership wants $50 to delete the code. AutoZone: 'We stopped doing that.' I think I'll wait it out or try to find another shop to do it cheaper. Yanking the PCM will be a last resort.

Note to self: In the future have the simulators at the time of ORY install.
Old 01-21-2004, 01:30 PM
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Your 02 codes will clear if you disconnect the battery for 20 minutes OR you can go through the pull the fuses process and do it quicker. It doesn't hurt a thing. Just make sure you know your radio code (if you turned the security feature on). I just did it and only had to reset my clock.

Good Luck,
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