HELP: Weird Check Engine Light Issue (Involving: p0313,p0174 ect) - E46Fanatics E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > Forced Induction Forum

Forced Induction Forum
Discuss supercharging, turbocharging and even nitrous and water injection here.

Thread Tools Search this Thread Rate Thread Display Modes
Old 04-02-2013, 12:00 AM   #1
Registered User
Join Date: Oct 2010
Location: Boston
Posts: 436
My Ride: 2001 325ci
Exclamation HELP: Weird Check Engine Light Issue (Involving: p0313,p0174 ect)

So I've read numerous threads and utilized the tips but i STILL have my check engine light since AUGUST on 2012! I FINALLY think i may have the solution, hopfully. Here's the facts:

2001 BMW 325ci (m54)

I had the infamous check engine codes:

p0313 Misfire Detection with Low Fuel level
p0174 System Too Lean (Bank 2)

p1343 Misfire Cylinder 1 with Fuel Cutoff
p1351 Misfire Cylinder 5 with Fuel Cutoff

also.. "Catylsts code" - There may have been a few others but I'll get to the point:

Initially, I brought it to a friend's shop, a reputable shop. He checked the codes, had an automotive electriction go over it and he found nothing. He supposedly did a smoke test, showing a small leak in the intake boot which was then changed. Next he installed new camshaft sensors, swapped the ignition coils, new NGK spark plugs, new air boot ect ect.. The usual tune-ups.. NOTHING CHANGED,

Next, after reading a few threads, I checked the MAF Sesnor myself and cleaned it. Next I took out the DISA, checked its functioning (fine) and cleaned it. STILL NOTHING.

Now it's been like this for quite some time. I'm out of options. My friend suggested something that he did to his truck. I installed a MagnaFLow Exhaust and a dual resonator delete over last summer. I forget if it was before or after the light; but either way.. my friend said there could be too much back flow or something causing the system to be too lean ect ect.. he suggested purchasing two 18mm spark plug fowlers and drilling one with a 3/4" drill bit. Next, plug the o2 sensor into the drilled fowler, connect the that fowler with the second fowler and then plugging the into where the o2 sensor origionally was. I guess this moves the o2 sensor out of the way and into the "air". This will then "confuse" the computer that everything is "okay".. ? IDK ? .. but it seemed legit when I googled it and it's worth a try.. Because if I replaced the o2 sensor, it wouldn't matter; it would keep reading "too lean" "misfire". I didn't know how to do it and he's hard to get in touch with.. we tried one day by putting the car on a jack, but there's a metal shield under the car making in difficult to remove the o2 sensor. We didn't have the time to finish.

And that's where I'm at now.. I need to figure out how to take the shield off. I wish I had access to a lift but I don't. Hopefully it'll work. If ANYONE had another solution or thought please let me know..

:/ Thanks fellow e46ers
DMahoney is offline   Reply With Quote
Ads by Google

Guests, get your FREE membership to remove this ad.
Old 04-02-2013, 12:08 AM   #2
Registered User
Join Date: Jan 2009
Location: Suburbia, NJ
Posts: 4,133
My Ride: M3
rcsummers is offline   Reply With Quote

cel, check engine light, e46, p0174, p0313

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON

All times are GMT -5. The time now is 06:05 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - VerticalScope Inc. All rights reserved.