Question about 2004 Chevrolet Malibu

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I have a 2002 Chevy Malibu with P0300 and P0171, really rough idle.

The car feels like it is going to stall out when I come to a stop at any intersections. Also when the car is in neutral the shaking almost goes away. It will do it when it is in park but also not nearly as bad as when it is in drive. Any ideas?

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Posted on Jan 02, 2017

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SOURCE: Car stalls when idling at stop light

have the car checked when the check engine light is on,also a good scanner will be able to give you the history codes,get back to me with the codes and we'll go from there. you need someone with a professional scan tool

Posted on May 13, 2009

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SOURCE: Rough idle

I had the same exact problem on my 2004 Colorado (3.5L). Cleaned the MAF sensor (with MAF sensor cleaner) and throttle body/plate - cleared it right up.

Posted on Aug 24, 2009

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2012 Nissan Versa 1.6, after idling for a about 20 minutes (or while in heavy traffic) engine starts sputtering and eventually would stall. Would no start till cooled off. The following codes come up :...


P0171 and P0174 are telling you that each cylinder bank is running too lean. P0300 is telling you there is a misfire, possibly caused by the other codes. This is why the engine is running rough.

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I once owned a trans repair shop-
if your trans fluid was in any way other than
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You have coil misfires as you know,several shown,
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You have O2 sensor codes as well as MAF

The only issue you have is to find the bad
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I could fix this for you but that's not an internet
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I definitely would stay away from a dealer.

Why was the trans let go until the fluid was
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Not to be hurtful -but it is a well known fact
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Wish I could have been there sooner, before you
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