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Service Engine Soon Light is on

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Old 05-10-2010, 12:25 PM   #1
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Question Service Engine Soon Light is on

My Service Engine Soon Light just came on. I've checked all of my fluids and they are fine. What could the problem be?
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Old 05-10-2010, 12:37 PM   #2
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Anything can cause it, go to Auto Zone or Oreilly's part store and have them hook a Code Reader up to it, it will tell you exactely what caused it, and it's free!!!
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Old 05-10-2010, 01:16 PM   #3
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Don't let them sell you anything, post the code(s) here first. Don't worry about the description.
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Old 05-10-2010, 02:11 PM   #4
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rear O2s for sure
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Old 05-10-2010, 02:50 PM   #5
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rear O2s for sure
Sorry to thread hijack, but is that a common problem? It's what my problem is, P0420, but I really haven't noticed anything wrong with how it's running at all.
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Old 05-10-2010, 03:16 PM   #6
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Originally Posted by 2000TransWS6 View Post
My Service Engine Soon Light just came on. I've checked all of my fluids and they are fine. What could the problem be?
Did you check your tire pressure?


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Old 05-10-2010, 03:25 PM   #7
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Sorry to thread hijack, but is that a common problem? It's what my problem is, P0420, but I really haven't noticed anything wrong with how it's running at all.
P0420 is most likely a bad drivers side cat - GM extended the cat warranty on the 00-02 LS1 F cars to 10yrs/120K.
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Old 05-10-2010, 03:28 PM   #8
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Did you check your tire pressure?


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Hey man, give this guy a break. Even though checking fluids is definitely funny, we all started somewhere.

If he gets the codes he can be advised on the next step.
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Old 05-10-2010, 03:33 PM   #9
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Im sure theres one already on the forums, but here is a PDF of all the DTC Codes
Attached Files
File Type: pdf DTC CODES.pdf (33.5 KB, 5642 views)
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Old 05-10-2010, 04:04 PM   #10
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Hey man, give this guy a break. Even though checking fluids is definitely funny, we all started somewhere.

If he gets the codes he can be advised on the next step.
Some that posted before me totally told him what he needed to do....get a scan.

I was just kidding with him.............

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Old 05-10-2010, 04:17 PM   #11
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Quote:
Originally Posted by HarrisonH View Post
Sorry to thread hijack, but is that a common problem? It's what my problem is, P0420, but I really haven't noticed anything wrong with how it's running at all.
i guess it is a common problem. the 420 code is the rear O2, i think driver side. but i see a lot of threads come up where people have this code. just get the rear O2s tuned out and forget about it.

/end thread hijack
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Old 05-10-2010, 04:34 PM   #12
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Haha, I didnt know what was wrong...I'm still use to having old motors and not these LS1's....I just checked everything that i could think of that had anything to do with the engine, but my tire pressure is all good lol....but I takes jokes pretty good...I had to go to a dealership and they scanned it for me. it was an O2 sensor that was out. The guy said something about the front O2 sensor on the passenger side, nothing about the rear O2 sensor? Ive just seen the one thats on my headers, where would the "front" one be? I dont know if having an EGR delete makes any difference or not.
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Old 05-10-2010, 05:15 PM   #13
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Originally Posted by 2001NBMZ28 View Post
P0420 is most likely a bad drivers side cat - GM extended the cat warranty on the 00-02 LS1 F cars to 10yrs/120K.
Eh, mine's not an LS1, it's got a V6. Oh well.
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Old 05-10-2010, 06:49 PM   #14
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Originally Posted by 2000TransWS6 View Post
Haha, I didnt know what was wrong...I'm still use to having old motors and not these LS1's....I just checked everything that i could think of that had anything to do with the engine, but my tire pressure is all good lol....but I takes jokes pretty good...I had to go to a dealership and they scanned it for me. it was an O2 sensor that was out. The guy said something about the front O2 sensor on the passenger side, nothing about the rear O2 sensor? Ive just seen the one thats on my headers, where would the "front" one be? I dont know if having an EGR delete makes any difference or not.
your front O2s are before the cat, rears are behind the cat. just follow the exhaust, you'll find em
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