P0171

Replace the lost oil, if it idles smoothly and accelerates smoothly youre fine

>2007 chevy malibu Inline 4

It's fine . Gm cars run best when severly neglected.

>>17328754
>Le GM meme
I fucking despise this car, its the worst car I've ever owned, but I got it for free so beggars can't be choosers.

>>17328762
It may be a boaring car but it is true that GM powertrains are the best on the market. Everything else is fair game.

>>17328633
p0171 is usually unmetered air getting into the intake system behind the MAF. You may have a vacuum leak.

>>17328633
O2 sensors usually never fix a P0171 or P0174, its a different code.

>>17328810
>>17328818
so your saying the code is not related to the gas cap being off?
Should I erase the code and see if it comes back later to confirm if that's the case?

>>17328859
Erase the code, if it comes back you have an issue.

>>17328859
Gas cap is a separate code for the evaporative control system it depends on the model or make on the code.

>>17328859
It's possible with some engines to get a lean code by leaving the oil cap loose/off due to the PCV system generating crankcase vacuum. An easy way to test this is to run the engine at idle and try removing the oil cap. If you feel a SMALL amount of suction and the engine starts running funny then you have the answer to your lean code. If the cap kind of flops around in the hole then it's also fine, but doesn't explain the lean code as this means you have fluctuating pressure/vacuum in the crankcase which effectively cancel each other out.

>>17328633
>forgetting to finish the job

are you "mentally different"

>>17328965
where would i feel the succ from? the oil cap? does that mean i can clear the code and drive and keep an eye on it in case it pops up again?

>>17329029
We all make mistakes, i made a big one, so what

>>17329081
It could be from the oil cap make sure its tight. Any leak in your crankcase above the oil could cause a vacuum leak because the PCV is behind the MAF. It is probably something to do with your oil cap since this happened after you changed the oil.

>>17329081
If it comes back see if there's an O ring on your oil cap and replace it or buy a new cap.

>>17328633
Holy fuck, you always check the job the next day.

Did you not hear anything or where you too busy sucking your brothers dick?

>>17329141
There is an o ring, but how will replacing it fix the issue?
>>17329182
>implying

>>17329234
If air is getting through the O ring it will be entering your engine through the PCV valve.

>>17329260

Bingo, I had this code for nearly a year and even heard the leak whistling but I couldn't find it until I saw some people talking about the PCV valve.

Took it off, cleaned it with carb cleaner, everything's back to normal.

You probably have sludge build up, that's what causes the valve to stick open.

>>17328633
> first thing to check is the OBD

Really? I bet you wear pink shirts you faggot

>>17329234
Just bend the tabs down with a hammer to make the prong squeeze a bit more

> still has factory oil cap o ring on a 30 year old car

File: 5e39fb4ed95a548a27e7e80d264d8e335dedce6db0a88d83e01111b124055f56.jpg (78KB, 495x497px) Image search: [Google]

78KB, 495x497px

>>17329441
Pink is an amazing summer color in san francisco, you should try it
>>17329428
Thats relieving to hear, i'll try it out
>>17329449
Holy kek 30 years?

File: Screenshot_20170606-160532.jpg (895KB, 1184x1645px) Image search: [Google]

895KB, 1184x1645px

Ohfuck.jpg

>>17332004
Erased the code and replaced the oil filter cap, the code hasn't came back yet.