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Hello i have done some searching and still have come up blank. i installed the CAI from AEM on a 06 2.2 cobalt. i have reset the computer twice now and after about 20 miles it still keeps comming on. please help. the wife is going to make me take it off till i can figure it out? can anyone help? heres what i have done.... unplugged neg battery cable installed CAI and drove nicely for 5 miles then got on it no light. next day drove to 7-11 and CEL came on... went home neg battery cable off turned start key waited 22 min reconnected battery started car let it run on it's own for 6 min then drove it 15 miles then CEl again... in walmart parking lot un plugged battery turned key waited 45 min shopping then reconnected battery then started it for 6 min again on way home about 15 miles still light came on what gives??
 

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Cel

Ya, I've done a custom intake a while ago and my CEL came on so i disconected the battery and after a while it came on again. Oddly after the 3rd time I did it it never came back on for months until just recently when it got cold out. I did the battery trick again and it didn't work to i took it to autozone and the scanner said my engine was running to lean... I had them erase the code and it came back on after about 150 miles. Then i checked for leaks, cleaned my MAS unpluged the battery and it was off for a while then came back on for about 7 miles and now its off..... i dunno what, those are all my tricks..
 

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does the cai come with a new maf sensor, if it does that may be a problem

and about how many miles do you have on your car,

btw who said to take off the negative cable to reset the cel, that ould cause a code on its own

i had a problem with that same code and it was the fuel filter as the problem
 

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AEM is known for producing CEL's... it's not really a big deal, it's just that more air is coming in that it's used to...
 

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you need to have the pcm reflashed for this,
after you drive your car for a while the pcm picks up the driving habits
and it learnes where the sensors are normally when you drive
if you reflash the pcm it will go back into the state it was coming off the production line and when it reads all the flow it should not set a cel anymore
 

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Yea im using my stock MAS... Its just not use to all the extra air
you need to have the pcm reflashed for this,
after you drive your car for a while the pcm picks up the driving habits
and it learnes where the sensors are normally when you drive
if you reflash the pcm it will go back into the state it was coming off the production line and when it reads all the flow it should not set a cel anymore
first off its a MAF sensor...Mass Air Flow....all aftermarket CAI's use your stock unit...to this date no high flow, corrected, or any other type of aftermarket unit is out...a bigger maf with a better correction rate at higer Freq would be nice tho...big intakes, more over all flow but then the TB become a bottle neck and restriction...but thats a whole other post...

jon..i wish to know what the hizzle your talkin about?...a reflash aint gonna do DICK....the most you can do with a simple reflash is changer your MAF fail Freq...not gonna solve this problum tho..

you could fix it with useing a Wideband and re-doing your entire VE/timeing maps with your MAF sensor correction rates...but that takes time, wideband and some know how...

what i would sugjest(sp?) is scaning the car with a simple code reader...then post the code so myself and others can know what the car is "thinking" and then problum solve from there.

off the batt tho...dissconnect the battery to clear the ECU then drive the car for a SOLID 20-30 min...very easy for the first 15-20 min

BUT you must take the rpms ALL the way up..so lock it in a gear and drive it to redline a few times...

then for the last few min drive it kinda hard this way the car will re-scan and learn its ST/LT fuel trims, VE maps, air flow and cylinder air mass maps...and it will do its best to take thouse maps and corralte them with you MAF's readings...that'll hopefully make the car happy and thus NO CODE
 

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you need to have the pcm reflashed for this,
after you drive your car for a while the pcm picks up the driving habits
and it learnes where the sensors are normally when you drive
if you reflash the pcm it will go back into the state it was coming off the production line and when it reads all the flow it should not set a cel anymore
first off its a MAF sensor...Mass Air Flow....all aftermarket CAI's use your stock unit...to this date no high flow, corrected, or any other type of aftermarket unit is out...a bigger maf with a better correction rate at higer Freq would be nice tho...big intakes, more over all flow but then the TB become a bottle neck and restriction...but thats a whole other post...

jon..i wish to know what the hizzle your talkin about?...a reflash aint gonna do DICK....the most you can do with a simple reflash is changer your MAF fail Freq...not gonna solve this problum tho..

you could fix it with useing a Wideband and re-doing your entire VE/timeing maps with your MAF sensor correction rates...but that takes time, wideband and some know how...

what i would sugjest(sp?) is scaning the car with a simple code reader...then post the code so myself and others can know what the car is "thinking" and then problum solve from there.

off the batt tho...dissconnect the battery to clear the ECU then drive the car for a SOLID 20-30 min...very easy for the first 15-20 min

BUT you must take the rpms ALL the way up..so lock it in a gear and drive it to redline a few times...

then for the last few min drive it kinda hard this way the car will re-scan and learn its ST/LT fuel trims, VE maps, air flow and cylinder air mass maps...and it will do its best to take thouse maps and corralte them with you MAF's readings...that'll hopefully make the car happy and thus NO CODE
Here's the deal. I read on .net that there's a GM update concerning the DTC code associated with adding in a CAI. Go to your dealer with the PCM code/CEL and they will update the PCM under warranty in most cases. Now keep in mind you may have something else going on with the vehicle. My car is going in for issues with my rotors *Yes my car IS having that issue even though I though everything was fine* and while it's in there they will be updating the PCM. I will then install a CAI and go from there.

I hope this helps.
 

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Im having the same issue here, i gota viper scanner. The code i pulled was P0171 "System too Lean"

Dealer keeps resetting which i can do with the scanner. 4th time its came on after my CAI install (been on for a month).
 

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Im having the same issue here, i gota viper scanner. The code i pulled was P0171 "System too Lean"

Dealer keeps resetting which i can do with the scanner. 4th time its came on after my CAI install (been on for a month).
There's a GM PCM update for that code. Ask their driveability tech to check it out.
 

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yea when i took it to autozone one time thats the code i got "PO171 Engine running to lean". So pretty much my choices are have the dealer update my computer or do that driving technique that 06Black was talking about? Im under warranty but would the dealer charge for that?
 

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make sure you didnt install the MAF in upside down. I know the one in the 2.0 sc engine has a "dog eared" place that aims down towards the air intake. Just my 2 cents
 

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I have the 2.2L and i know my senser is facing the right way. I just dunno what to do now...maybe ill check the dealer.
 

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yea when i took it to autozone one time thats the code i got "PO171 Engine running to lean". So pretty much my choices are have the dealer update my computer or do that driving technique that 06Black was talking about? Im under warranty but would the dealer charge for that?
Depends on the dealer. Take it and ask if it is billable by their standards. The fact there's a PCM update from GM out there tells me that it should be fixable through warranty.
 

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Best thing to do is just give up, haha. I have an AEM cai on my 2.4SS, and for a while it was back and forth with being on and off. It'd be on for a few days.......off for a few days......rinse and repeat. Finally, I believe the car adjusted to the change, b/c the CEL hasn't come on in ages. The lights back on now, but not due to the intake anymore.....its on now b/c I have an XTC 2.5" de-cat downpipe, but i'll be fixing that CEL as soon as my Voodoo Boost/Innovative O2 simulator comes in. I'm pretty sure that the HP Tuners engine software has a solution for the CEL on due to a cai, but unless you wanna drop $500 on it, then don't worry about it. I don't believe our cars have a "limp" mode when our CEL is on, so it shouldn't cause any real problems. Good luck.
 

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Ya im just doing what WhiteSS said....so far it came on twice and went off twice, right now its off...but for how long lol
 

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My PCM has been updated today. I don't have the funds for a CAI right now with it being Christmas season and all, but when I do I'm going with either AEM or a custom fit with the AEM dryflow. Maybe I'll go with Injen but I don't want to deal with an Oil based CAI filter. I'll keep you all posted.
 

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I'd like to let all of you know, on OBD2 cars (anything after 1996) unhooking the battery cables will not clear DTC codes. the PCM will store them. and when certian driving conditions are met, will check for them, and reset them. The only way to have the codes cleared is by clearing them with a tech 2 or other scan tool.

if you're getting a CEL, you should probably take it somewhere to see what the code is instead of unhooking the battery and virtually doing nothing about it.
 

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and our cars actually do have a limp mode, but they wont go into limp mode every time a cel coems on. Limp mode just happens under certian conditions. like on a 2.2 it can go into limp mode for trans problems.
 

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I'd like to let all of you know, on OBD2 cars (anything after 1996) unhooking the battery cables will not clear DTC codes. the PCM will store them. and when certian driving conditions are met, will check for them, and reset them. The only way to have the codes cleared is by clearing them with a tech 2 or other scan tool.

if you're getting a CEL, you should probably take it somewhere to see what the code is instead of unhooking the battery and virtually doing nothing about it.
Yeah I don't know who started that rumor of unhooking the battery cable, and I don't know why folks still do it after several posts like this saying this doesn't help! :eek:

I'm looking to get the CAI on in the next 30 days or so. About how quickly did folks get a cel after putting on their CAI? I will post up if the GM PCM update(s) I have on my car now take care of that issue or not and let you know what to ask for at your local dealer.
 
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