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Old 11-11-2011, 03:41 PM   #1
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AEM Cold Air Intake install (Engine light on)

Just installed an AEM cold air intake on my 04 Wrangler, it seems to be operating properly, but now my check engine light is on.

Any ideas?

I searched the forums for an answer, but didn't find one.

Any help would be greatly appreciated.

J

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Old 11-11-2011, 03:58 PM   #2
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Any ideas?
you'll want to read this: Cold Air Intake FAQ


reinstall the stock box....

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Old 11-11-2011, 03:59 PM   #3
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Take it off and go back to stock. They are a waste of money.
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Old 11-11-2011, 04:27 PM   #4
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Did you forget to plug in the IAT sensor? Otherwise you need to post the code to get any help. The 4.0 shouldn't throw any engine code with any type of intake because its map based.
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Old 11-11-2011, 04:34 PM   #5
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Did you forget to plug in the IAT sensor? Otherwise you need to post the code to get any help. The 4.0 shouldn't throw any engine code with any type of intake because its map based.
No, everything is plugged in. Can't post the code, since I don't have a "code finder". Don't really want to spend the $100 bucks for one.

Didn't think something so simple would be a big headache.
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Old 11-11-2011, 04:50 PM   #6
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Well, depending on the year of your wrangler, you can just do the key trick to grab the code. Turn your ignition on,off, then on again three times and wait for a code to show up (don't actually start the jeep) The code will take a few seconds to show up in the odometer.

If your jeep doesn't have that feature (a few years don't) you could always take it to autozone and have them read the code for free.
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Old 11-11-2011, 05:37 PM   #7
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good chance something got moved or bumped in the process of installing the TB spacer that comes with it, check your vaccuum lines and make sure you re-installed your TB and all sensors properly. I know when i installed my 63mm TB and brute force i bumped off the really small vaccum line(nearest to the firewall on log style manifold) and the rubber was so old i had to silicone it shut to stop the air leak and keep in snugged onto the manifold.
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Old 11-11-2011, 05:43 PM   #8
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Mine went on easy and works well. No leaks around the TB? Did you unplug the battery when installing and then let it idle for a few minutes before getting on it.
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Old 11-11-2011, 06:08 PM   #9
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Go to Autozone and get the code done for free.

I just installed the same CAI and I probably wouldn't have except the PO already had one on there so it was either stick with it a CAI or go find all the stock parts. I don't know what it ran before but it sure runs extremely well now and I kind of like the sound.
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Old 11-11-2011, 07:44 PM   #10
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Mine went on easy and works well. No leaks around the TB? Did you unplug the battery when installing and then let it idle for a few minutes before getting on it.
No I didn't. Might that've caused it? If so how can I fix that?
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Old 11-11-2011, 07:49 PM   #11
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Well, depending on the year of your wrangler, you can just do the key trick to grab the code. Turn your ignition on,off, then on again three times and wait for a code to show up (don't actually start the jeep) The code will take a few seconds to show up in the odometer.

If your jeep doesn't have that feature (a few years don't) you could always take it to autozone and have them read the code for free.
I have an 04. Just did the on off 3 times and got a P 0123 code. However, the check engine light is now off.

Not sure if it reset or just went through it's cycle. Either way seems to be working just fine now.

Thanks for the help.
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Old 11-11-2011, 08:18 PM   #12
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I have an 04. Just did the on off 3 times and got a P 0123 code. However, the check engine light is now off.

Not sure if it reset or just went through it's cycle. Either way seems to be working just fine now.

Thanks for the help.
if you don't see the CEL within the next 200 miles...i think your clear.
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Old 11-11-2011, 08:59 PM   #13
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Quote:
Originally Posted by JHall

I have an 04. Just did the on off 3 times and got a P 0123 code. However, the check engine light is now off.

Not sure if it reset or just went through it's cycle. Either way seems to be working just fine now.

Thanks for the help.
P0123 means there is a problem with your TPS.
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Old 12-12-2013, 12:05 AM   #14
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Did you ever figure out how to fix it? I have the same intake on my 03 sport and havin the same problem. It just came on today and it's code is p0123. So what did you do to fix it?
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Old 12-13-2013, 12:39 AM   #15
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Did you ever figure out how to fix it? I have the same intake on my 03 sport and havin the same problem. It just came on today and it's code is p0123. So what did you do to fix it?
Replace the TPS

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