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06 Chevy Malibu ss problems

Tiny
KTKOOLAID
  • MEMBER
  • 2006 CHEVROLET MALIBU
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 45,000 MILES
I recently purchased a 2006 chevy malibu ss with 45,000 miles on it. The past few days my check engine light came on and my car lost some serious horsepower along with hesitation to go. I took it to a chevy dealership who explained that the code was bank one fuel curve lean, and that all of my O2 sensors are working fine and that they wiped out the code and it's working fine. Um WHAT? Not too happy with that mechanic visit. What could be the problem with my car? When it happens it doesn't happen all the time, one day the light will be on, and one day it wont. It will also just come on when driving and my car will instantly start running like crap. Also my traction control keeps shutting itself off. Is that a speed sensor problem?
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Tuesday, February 8th, 2011 AT 3:05 PM

7 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
We would need the exact code number to be of any help.
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Tuesday, February 8th, 2011 AT 4:05 PM
Tiny
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  • 3 POSTS
P1074
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Monday, February 14th, 2011 AT 9:50 PM
Tiny
WRENCHTECH
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I assume you mean PO174. That is a lean code but only on bank 2, assuming that was the only code you found. This means look for something specific to the front bank like clogged injectors or a localized vacuum leak. It could also be a bad sensor incapable of seeing a rich mixture.
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Monday, February 14th, 2011 AT 9:56 PM
Tiny
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Yeah sure! You have assumed correctly, thats the only code it has thrown. If it was clogged injectors wouldn't it happen all the time? I cleaned my MAF sensor and its running great again. Could a MAF sensor send my car into "limp" mode and rob me of gas milage and horsepower though?
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Monday, February 14th, 2011 AT 11:13 PM
Tiny
WRENCHTECH
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Your car doesn't really have a limp mode. If it loses the signal from a major sensor like the MAF, it will substitute a predetermined default value for the sensor and then set a code for it. You have a problem that is only effecting one side of the engine. I think I would try an 0/2 sensor if no vacuum leaks are found.
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Monday, February 14th, 2011 AT 11:21 PM
Tiny
WYCH DR
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  • 2 POSTS
Just wondering if this "issue" was ever resolved. I have the same issues.

Dealer replaced vacuum hoses, intake gaskets, valve cover gaskets. Wth? Traction control light comes on 50-100 times a day. Check engine comes on as a result of this light above.

Next visit, dealer said my fuel was "heavy"? Other than that, they say nothing mechanically wrong.

So why does light come on 100 times a day, since nothing is mechanically wrong? Doesn't add up.

At a total loss, just want car fixed.
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Friday, June 10th, 2011 AT 6:39 PM
Tiny
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You need to start a new question of your own please.
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Friday, June 10th, 2011 AT 9:45 PM

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