Air Intake And Check Engine Light!!! (p0171) - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 54 (permalink) Old 04-25-2008, 07:57 AM Thread Starter
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Angry Air Intake And Check Engine Light!!! (p0171)

Ok so WTF???!!!!! Am i Doing something wrong? Everytime i put in an aftermarket Intake My check Engine light comes on with code P0171 (Bank 1, System Too Lean) Did anybody have this problem with the AIR INTAKE?? Im thinking that there is not proper mixture so it could eather be bad fuel injectors, or need to change the Fuel FIlter, Or maybe the teh MAFS is defective..... BUT WHY THIS ONLY HAPPENS WITH THE AFTERMARKET INTAKE????? When i put the regular intake the code desapears...Ive been swtiching back and forth for the last 4 weeks.. Guys i really want to know what you guys think????
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post #2 of 54 (permalink) Old 04-25-2008, 08:03 AM
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Are you sure there is no leak - all connections are good? What A/M intake are you installing?

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post #3 of 54 (permalink) Old 04-25-2008, 09:10 AM
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Yea.... what Aftermarket Intake are you running ? ?



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post #4 of 54 (permalink) Old 04-25-2008, 10:06 AM
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^^doesn't matter what intake....what year is your car?

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post #5 of 54 (permalink) Old 04-25-2008, 01:30 PM Thread Starter
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I tried a K&N and then I made one based on Spectre modules... I returned the K&N! But it did it it with both of them anyways!!! It's a 05 Cobalt Base. Ohh also tried checking for leaks but appears to be None....
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post #6 of 54 (permalink) Old 04-25-2008, 02:47 PM
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Ok, i had the same problem a while back. First things first, reflash your computer or reset it or something. Normally this can happen when your computer needs to be reconfigured cuz there is a change in the air flow.

Also check for leaks. My problem was a small nudge in the clamp over the throttle body and it made me throw a light.
If its the same problem as i had, do this. cycle through your in dash things (miles per gallon and all that stuff) and see if your coolant light is coming up with no numbers. Then its the same problem. Reflash your computer and check for leaks. If not go back to Kand N and dont make your own. if you have SAI your screwed.

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post #7 of 54 (permalink) Old 04-25-2008, 10:39 PM
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Quote:
Originally Posted by Alpha_Male1 View Post
^^doesn't matter what intake....what year is your car?
it does matter.

Oiled filters often come to oiled from the manufacture, dry filters wont do this. Disconnect your MAF sensor spray with electronics cleaner or MAF cleaner. Let it COMPLETELY dry, re-connect it, pull the neg from the battery cable and re attach it to reset the comp. Then go test it out, even if the light stays on for a lil, it takes a bit for it to turn off sometimes because the comp. needs to re-calibrate itself.

no worries man

obviously check for leaks but im sure its the sensor.
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post #8 of 54 (permalink) Old 04-26-2008, 01:04 AM
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I had the same problem with my car, and my friend's honda also did the same thing. It's not a problem at all. The reason why the check engine light comes on is because your car is now sucking on more air than the computer was originally programmed for. It's a common thing. In my friends honda, his reset itself. My car still hasn't reset, but I'm not to worried about it. I'll reset the thing when I get a chip. No worries, it's normal.

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post #9 of 54 (permalink) Old 04-26-2008, 05:21 AM
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Quote:
Originally Posted by Codyak Supercharged View Post
it does matter.

Oiled filters often come to oiled from the manufacture, dry filters wont do this. Disconnect your MAF sensor spray with electronics cleaner or MAF cleaner. Let it COMPLETELY dry, re-connect it, pull the neg from the battery cable and re attach it to reset the comp. Then go test it out, even if the light stays on for a lil, it takes a bit for it to turn off sometimes because the comp. needs to re-calibrate itself.

no worries man

obviously check for leaks but im sure its the sensor.
No it doesn't....

The oiled filter is fine just take off the business end of the battery cable for ATLEAST 15min....it will take about 10 start ups before it goes away. This is especially true because of the E16A ECU that you have....which sucks donkey ass BTW cause it's so picky about it's AFR. I've never heard of K&N "over oiling" the product THEY make, did you get the right one? I know they make one for the 2.2L and the 2.4L. If you want you could try an AEM or Injen next LOL

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.............../ \

Last edited by Chester; 04-26-2008 at 09:09 AM. Reason: Typo
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post #10 of 54 (permalink) Old 04-26-2008, 07:46 AM Thread Starter
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OK guys so i reset it yesterday again.... we gunna try it again.... later on today im gunna check for leaks again.... altough aparently there is none.... Ohh im gunna take pictures today to show you guys what i invented, since i returned the K&N i did Spectre modules .... I'm in the process of buying a Fujita so who nows!! BUT I GOTTA ADMIT THE BATTERY THING I DID NOT TRY!! Anyways i let you guys know by Monday what happens!!

Last edited by Chester; 04-26-2008 at 09:13 AM.
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