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Old 08-29-2011, 07:58 PM   #1
jaydeep
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2003 325I Error Codes P1083, P1085, P0174, P0171, P0313

Hi guys,

I recently my "Service Engine Soon" light is on. I took the car to the local auto store and pulled these codes from it.

P0171 Bank 1 too lean
P0174 Bank 2 too lean
P1083 Fuel control limit too lean Bank 1 Sensor 1
P1085 Fuel control limit too lean Bank 2 Sensor 1
P0313 Misfire has occurred with low fuel

My vehicle is a 2003 325I with 92K miles on it. Any advise you guys could give me beyond that would be greatly appreciated.
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Old 08-29-2011, 08:13 PM   #2
rube
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codes

Hey check your intake boots (both) any small cracks in the rubber will give you vacume leaks and give you those codes
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Old 08-29-2011, 08:14 PM   #3
Zchild
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Sounds like the classic symptoms of a vacuum leak; check your lower intake boots and get a smoke test done as soon as you're able. Just my two and a half cents worth...
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Old 08-29-2011, 08:56 PM   #4
jaydeep
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Originally Posted by Zchild View Post
Sounds like the classic symptoms of a vacuum leak; check your lower intake boots and get a smoke test done as soon as you're able. Just my two and a half cents worth...
What is smoke test? Why you say soon. Will it make other parts go bad?
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Old 08-29-2011, 09:14 PM   #5
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The sooner you get a smoke test the sooner you will discover or uncover the vacuum leak. A smoke test is where the mechanic blows smoke through the vacuum system in order to find the leaking hoses. It could either be something as simple as lower intake boots or as complex as crankcase ventilation hoses. No the problem won't get worse nor cause other parts to malfunction, its just that most folks are in a hurry to get back on the road...
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Old 08-29-2011, 09:19 PM   #6
ShepsBMW
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Im dont want to start yet another running lean topic, so ill add on here. If the code is bank two only and intake boots are fine, does that indicate an o2 sensor?
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Old 08-29-2011, 09:29 PM   #7
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not necessarily... i had bank1 only lean and it was intake boots, O2 sensors RARELY go bad.
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Old 10-10-2011, 08:27 PM   #8
jaydeep
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I looked at intake boots and checked DISA both are good. What else to check?
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Old 10-10-2011, 08:38 PM   #9
SPDSKTR
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Could be a hose connected to the intake boot with a crack. And did you actually take the intake boots completely off and inspect them or just give a quick look through the engine bay?
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Old 10-10-2011, 08:41 PM   #10
jaydeep
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Originally Posted by SPDSKTR View Post
Could be a hose connected to the intake boot with a crack. And did you actually take the intake boots completely off and inspect them or just give a quick look through the engine bay?
I took out intake boots and looked. Which hose you are talking about?
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Old 10-13-2011, 09:52 AM   #11
Jmarlowe330i
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Originally Posted by jaydeep View Post
I took out intake boots and looked. Which hose you are talking about?
Check both F-tube lines coming off top of intake boot sometimes they crack...very cheap to fix like un 2 doll hairs
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Old 12-07-2011, 11:53 PM   #12
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having the exact same code. how much does a smoke test run for dont want to get ripped by a mechanic.
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Old 10-21-2015, 11:52 PM   #13
Jeno
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Another cause of P1083, 85 and P1071, 74 codes is the break booster

After chasing the lean codes on both Banks 1 and 2 and after replacing the following:

All rubber hoses
Valve cover gasket
CCV valve and pipes
O-ring dipstick
O-ring DISA
MAF
Upstream O2 sensors

I finally found the cause of lean codes, the break booster. Finally it dawned on me that hissing in the cabin when pressing the break could be the cause of vacuum leak.
Running diagnostics, the short term trim on both banks topped at 27%. Took a piece of rubber hose and caped it air tight and I plugged my break booster hose into the capped hose. As soon as the leak was caped the short term trim started to come back down and finally I started seeing negative trim values which I havenít seen in a long time. Furthermore, I started seeing long term trim values being updated, which I havenít seen that behavior since the issues started.
Replaced brake booster and problem solved!!!!
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Old 10-22-2015, 01:45 AM   #14
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Bumping an almost 4 year old thread???

If you would have searched, you would find I have clearly covered this issue - in one of my many posts quite thoroughly.

http://forum.e46fanatics.com/showthread.php?t=1057387

http://forum.e46fanatics.com/showthread.php?t=897616

Now it is time to address the fuel pump.

http://forum.e46fanatics.com/showthread.php?t=929501
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 10-22-2015, 10:42 PM   #15
Jeno
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Yes bumping the thread

Yes I am bumping the thread since my interest is to grow the communities knowledge base through short and concise solution, unlike some solutions that are full of fluff and misinformation.

Barely a couple of hours past since my post and you are complaining. Are you trolling or protecting something? Let's be less egotistical and focus on helping out people.

Furthermore, if you would have written more concise posts like I did, where specifically mentioned Lean codes are possibly related to a bad break booster. This way search engines like Google would return in the results when one searches lean codes P1071, P1074.
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Old 10-23-2015, 05:32 AM   #16
franz
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Oh snap.
Calling out jfoj is just not right.
And doing it with bad spelling at that.

Last edited by franz; 10-23-2015 at 05:49 AM.
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Old 10-23-2015, 06:36 AM   #17
jfoj
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Quote:
Originally Posted by Jeno View Post
Yes I am bumping the thread since my interest is to grow the communities knowledge base through short and concise solution, unlike some solutions that are full of fluff and misinformation.

Barely a couple of hours past since my post and you are complaining. Are you trolling or protecting something? Let's be less egotistical and focus on helping out people.

Furthermore, if you would have written more concise posts like I did, where specifically mentioned Lean codes are possibly related to a bad break booster. This way search engines like Google would return in the results when one searches lean codes P1071, P1074.


Jeno my friend, please do your homework.

Lets see, I am a "troll", "egotistical", not helping people out, posts full of fluff and misinformation. Well I think you need to spend a few hours reading over many of my posts here and I think your eyes will be WIDE open and you will learn far more than you ever would want to know about problems with your E46. I have over 16,000 posts on this forum alone and I am involved in many other forums, so this is not my only place I call home. I doubt all of my posts here are troll posts, full of fluff and misinformation, I would probably be banned from this forum if this was the situation.

I do not typically put Lean Codes (P0171, P0174) in the title of my threads. SO many things cause Lean codes, but I typically put more info in the body of my posts. Also keep in mind the art of searching and doing research is just that, it is an art. You need to spend time doing your research using multiple ways to search, multiple key words, search using search engines and search using the forum search tools. BTW, over 5,000 views on the Brake Booster thread alone in 1 year! I have other threads with over 200,000-300,000 views.

You have a whopping 2 posts to your credit and just signed up here, you might want to post that you have also replaced the power brake booster in the thread I have on bad brake boosters so people can see that this problem is a real problem and more and more of these power brake booster are failing.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299

Last edited by jfoj; 10-23-2015 at 06:52 AM.
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