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Old 02-24-2011, 09:32 AM   #1 (permalink)
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Default OBD code P2279

Hey guys!

I own a Chevy Optra5 2005 for almost two years now, since last week my check engine is on and when i plug it in it gave me code P2279 Intake air system leak. Can somebody tell me what it could be?
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Old 02-24-2011, 03:10 PM   #2 (permalink)
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sometimes the spot where the intake meets the throttle body can brake. take the intake off the throttle body and inspect the intake for cracks. if thats not it look for any loose connections or tubing on the intake and throttle body. let us know what happens
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Old 02-25-2011, 07:32 AM   #3 (permalink)
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Ok thanks for the tip i'll try that this week end and let you know what i've found!!
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Old 02-26-2011, 11:39 AM   #4 (permalink)
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I've check it this morning and found nothing unusual i dont know what to do next!! I've seen a post on this forum saying to check for melted tubing but all tube are ok!!
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Old 02-26-2011, 11:50 AM   #5 (permalink)
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One thing i ve notice my gas cap is loose can it be a problem?
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Old 01-24-2012, 09:33 AM   #6 (permalink)
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Check the vaccum tubes going to the throttle body and intake mine was cracked and sucking air
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2005 Suzuki Forenza
9/04 Build Date
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Old 01-27-2014, 08:59 PM   #7 (permalink)
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Quote:
Originally Posted by John32 View Post
Check the vaccum tubes going to the throttle body and intake mine was cracked and sucking air
Same here & I replaced the intake vacuum hose to the throttle body. But now my 2004 Forenza is idling too low & starts to stall if I turn on the a/c for instance. Now what? I also previously had the P2279 & P0507 codes. I thought fixing the vacuum hose would also fix the idle speed, but now it is too low. Any suggestions greatly appreciated?
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Old 01-28-2014, 12:11 AM   #8 (permalink)
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Quote:
Originally Posted by BStew6us View Post
Same here & I replaced the intake vacuum hose to the throttle body. But now my 2004 Forenza is idling too low & starts to stall if I turn on the a/c for instance. Now what? I also previously had the P2279 & P0507 codes. I thought fixing the vacuum hose would also fix the idle speed, but now it is too low. Any suggestions greatly appreciated?
Found the "Idle Learn Procedure" in my Service Manual. Think I have solved my problem!
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Old 01-28-2014, 01:01 AM   #9 (permalink)
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hi BStew6us welcome to the forum! if that doesnt fix the problem it might be the IAC. it could be faulty or just dirty and need a little cleaning. let us know what happens
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Old 02-14-2014, 11:57 PM   #10 (permalink)
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Yeppers, the 'Idle Learn Procedure' fixed the low idle and no more check engine light since replacing the intake vacuum hose. Thanks for your help and suggestion, 7-eleven!
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