I just install the AEM CAI and the engine light turn on then i took the negative battery off then plug it again after the first time it okay. the next day whenm i start my car the engine light show up again anyone please help please thank you

 

I just put mine on Monday and I haven't had that problem, but I did worry about that. Did you plug all vacuum hoses back into the right areas? Double check the vacuum hoses that run into the airsensor that is suppose to be bolted underneath back side of the intake pipe. Make sure you didn't cross the smaller hoses up at the top near the fuel rails. Check all hoses, a vacuum leak can cause this, I am sure.

 

yep. check ALL of your hoses, make sure they're not on the wrong connection or not on at all.

 

I check everything but the light still turn on. any suggestion thank you

 

I'm not sure if you have to mess with this or not but, if you did make sure you put it back the right way. Its a check valve and it MUST face the right way or you'll get a CK engine light. If it is spin it around and reset the ECU, then you should be all set. I'd double check it anyway just to be sure.

 

Hey, listen up to DarkKnight's advice. I had the same problem after install of an Injen CAI and after rearranging my vacuum lines as per his photo and Utah's advice, I reset the ECU and all is now cooperating nicely. No CEL. I can just about guarantee it's a crossed vacuum line problem...there's just not anything else to foul up. Best luck.
Semper fi!

 

Here's the noted thread:

https://www.s2ki.com/forums/showthread.php?...&threadid=60549

Utah