E90Post
 


 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > P29F3 fuel pressure sensor shadow code help



Reply
 
Thread Tools Search this Thread
      02-06-2013, 12:54 PM   #1
Spoolin1
Private First Class
 
Spoolin1's Avatar
 
Drives: 2007 335i
Join Date: Dec 2010
Location: Sellersburg, IN

Posts: 172
iTrader: (1)

P29F3 fuel pressure sensor shadow code help

Hey guys,

Need your help.

I have my CPO warrantied 335i at the local dealer for the P29F3 fuel pressure sensor code that is shadowing and won't clear; no check engine light. They just called and stated that it won't cause any issues and they have put that in righting on the receipt. Is this true that no issues will occur? I've heard that even though it's a shadow code, the ECU will still pull power/timing, etc. Don't know if this is true or not and just trying to figure out if I should make them change the fuel pressure sensor because of the code or just not worry about it. I do have a new AMS intercooler going on and Cobb stage 1+ tune and don't want to be losing power because of this shadow code or worse, hurt the engine, fuel system, etc.
__________________
07 335i
-AMS intercooler with Cobb AP stage 1+ 93 tune.
02 Honda S2000
-741 whp 471 wtq (dynojet) @ 29.6 psi on e85; now on 34 psi, 800+ whp.
Spoolin1 is offline   United_States
0
Reply With Quote
      02-06-2013, 02:46 PM   #2
cn555ic
BimmerPost Supporting Vendor

 
cn555ic's Avatar
 
Drives: Bimmerscoding.com
Join Date: Jun 2007
Location: New York

Posts: 18,275
iTrader: (5)

Send a message via Yahoo to cn555ic
I had that code also for a long time. Car drove fine for a while and everytime I went to clear it, the code came back time and time again. It is a faulty sensor for sure, but when it finally takes a crap you will know for sure as the car will misfire and won't allow you to apply half or full full throttle. You can cruise with it normal but as soon as you got WoT it will sputter and misfire. I would tell them to change it out.
__________________
917-939-4980 CODING E and F Series New York Area

cn555ic is offline   United_States
0
Reply With Quote
      02-06-2013, 03:12 PM   #3
Spoolin1
Private First Class
 
Spoolin1's Avatar
 
Drives: 2007 335i
Join Date: Dec 2010
Location: Sellersburg, IN

Posts: 172
iTrader: (1)

Thanks bud.
__________________
07 335i
-AMS intercooler with Cobb AP stage 1+ 93 tune.
02 Honda S2000
-741 whp 471 wtq (dynojet) @ 29.6 psi on e85; now on 34 psi, 800+ whp.
Spoolin1 is offline   United_States
0
Reply With Quote
      02-06-2013, 03:22 PM   #4
Spoolin1
Private First Class
 
Spoolin1's Avatar
 
Drives: 2007 335i
Join Date: Dec 2010
Location: Sellersburg, IN

Posts: 172
iTrader: (1)

Well, I just spoke to my dealer and they can't warranty cover a shadow code until it actually shows the check engine light or fault and then BMW will cover it under warranty. I guess I'll just have to wait until it goes out completely. The tech even knew it was about to go out; what a bunch of crap. Maybe I'll get lucky and my turbo's, fuel pump, coils and injectors will go out at the same time the fuel pressure sensor takes a crap and I can then get it all fixed.

BTW the car only has 29k miles and is a late Dec 07 built car. I've had this car in for more warranty crap than all of the cars I've owned put together and I've had A LOT!
__________________
07 335i
-AMS intercooler with Cobb AP stage 1+ 93 tune.
02 Honda S2000
-741 whp 471 wtq (dynojet) @ 29.6 psi on e85; now on 34 psi, 800+ whp.
Spoolin1 is offline   United_States
0
Reply With Quote
      02-06-2013, 03:34 PM   #5
2nice89
Banned
 
Drives: 2007 e92 335i
Join Date: Aug 2012
Location: Queens Village

Posts: 242
iTrader: (0)

Garage List
2007 335i  [0.50]
Quote:
Originally Posted by cn555ic View Post
I had that code also for a long time. Car drove fine for a while and everytime I went to clear it, the code came back time and time again. It is a faulty sensor for sure, but when it finally takes a crap you will know for sure as the car will misfire and won't allow you to apply half or full full throttle. You can cruise with it normal but as soon as you got WoT it will sputter and misfire. I would tell them to change it out.
He is right... I had this problem and the car misfires like crazy at wot...i would beg them to swap it out lol
2nice89 is offline   United_States
0
Reply With Quote
      02-06-2013, 08:59 PM   #6
Spoolin1
Private First Class
 
Spoolin1's Avatar
 
Drives: 2007 335i
Join Date: Dec 2010
Location: Sellersburg, IN

Posts: 172
iTrader: (1)

I tried and even told them that I'll be back as soon as the CEL comes on and it goes out, so it's a little ridiculous to not go ahead and change it out beforehand if you know it'll go out eventually.
__________________
07 335i
-AMS intercooler with Cobb AP stage 1+ 93 tune.
02 Honda S2000
-741 whp 471 wtq (dynojet) @ 29.6 psi on e85; now on 34 psi, 800+ whp.
Spoolin1 is offline   United_States
0
Reply With Quote
      02-06-2013, 09:03 PM   #7
cn555ic
BimmerPost Supporting Vendor

 
cn555ic's Avatar
 
Drives: Bimmerscoding.com
Join Date: Jun 2007
Location: New York

Posts: 18,275
iTrader: (5)

Send a message via Yahoo to cn555ic
The sensor cost about 100 bucks or so and it's not hard to change if you have some knowledge of the N54 engine and how to get stuff off. Might worth to do it yourself like I and many have done before
__________________
917-939-4980 CODING E and F Series New York Area

cn555ic is offline   United_States
0
Reply With Quote
      02-06-2013, 09:05 PM   #8
Spoolin1
Private First Class
 
Spoolin1's Avatar
 
Drives: 2007 335i
Join Date: Dec 2010
Location: Sellersburg, IN

Posts: 172
iTrader: (1)

Yeah, I usually do most everything myself but in this case, having the CPO; I'd rather just leave it for them when it goes out. I'm sure the injectors and other things will be going out soon too as it seems to be a regular occurance, so it'll be on them.

Thanks for the advice though, I'll keep it in mind.
__________________
07 335i
-AMS intercooler with Cobb AP stage 1+ 93 tune.
02 Honda S2000
-741 whp 471 wtq (dynojet) @ 29.6 psi on e85; now on 34 psi, 800+ whp.
Spoolin1 is offline   United_States
0
Reply With Quote
      02-08-2013, 07:11 AM   #9
neilvosko
Major
 
neilvosko's Avatar
 
Drives: 335i e92 FBO
Join Date: Dec 2011
Location: miami

Posts: 1,398
iTrader: (16)

The ecu will run a default map with that code, but like the rest of us change that sensor yourself its 70 bux which is like 20 bux more than deductible for cpo but you know it will be done right
neilvosko is offline   United_States
0
Reply With Quote
      02-08-2013, 10:47 AM   #10
ksalih
First Lieutenant
 
ksalih's Avatar
 
Drives: '08 335i
Join Date: Mar 2012
Location: Gilbert, AZ

Posts: 322
iTrader: (1)

I've got The same code..but only as of last night. 40/60 mix of e85/91 and wot in 3rd and I missfired ...threw the code 29F3 directly after. Now I'm having issues wot in any gear. I might have some bad e85..or maybe I should add some more 91 to my mix to dilute the e85. Could this be a failing lpfp rather than just a failing sensor?
__________________
'08 E92 335i Pre-LCI | Sparkling Graphite Metallic | VRSF Downpipe | JB4 G4 | Mr. 5 Intake | 50/50 e85/91| Alpina B3 TCU Flash | NGK 5992 Plugs | More to Come...?
ksalih is offline   United_States
0
Reply With Quote
      02-08-2013, 12:16 PM   #11
maximum96
New Member
 
Drives: 08 e60
Join Date: Apr 2012
Location: queens

Posts: 27
iTrader: (0)

You should log, 29f3 u might be leaning out, too much e85,
Faulty lpfs will not cause any issues, just inability to los lpfp, many have ran with this ghost code, including me, your misfires could be due to other factors, probably sparkplugs, carbon buildup, etc.
maximum96 is offline  
0
Reply With Quote
      02-08-2013, 12:36 PM   #12
cn555ic
BimmerPost Supporting Vendor

 
cn555ic's Avatar
 
Drives: Bimmerscoding.com
Join Date: Jun 2007
Location: New York

Posts: 18,275
iTrader: (5)

Send a message via Yahoo to cn555ic
When that sensor finally goes that's the symptoms The car will have. Keep trying wOt and next thing you will get is a HUGE backfire like someone shot a rifle and then check engine light
__________________
917-939-4980 CODING E and F Series New York Area

cn555ic is offline   United_States
0
Reply With Quote
      02-08-2013, 04:42 PM   #13
ksalih
First Lieutenant
 
ksalih's Avatar
 
Drives: '08 335i
Join Date: Mar 2012
Location: Gilbert, AZ

Posts: 322
iTrader: (1)

Quote:
Originally Posted by maximum96 View Post
You should log, 29f3 u might be leaning out, too much e85,
Faulty lpfs will not cause any issues, just inability to los lpfp, many have ran with this ghost code, including me, your misfires could be due to other factors, probably sparkplugs, carbon buildup, etc.
Its this. Diluted The E85 with 91 and I've been okay. Need to get the inline lpfp...
__________________
'08 E92 335i Pre-LCI | Sparkling Graphite Metallic | VRSF Downpipe | JB4 G4 | Mr. 5 Intake | 50/50 e85/91| Alpina B3 TCU Flash | NGK 5992 Plugs | More to Come...?
ksalih is offline   United_States
0
Reply With Quote
      02-08-2013, 09:05 PM   #14
BMWM.D.
Stupid Idiot
 
BMWM.D.'s Avatar
 
Drives: E90 335i & C6 Grand Sport
Join Date: May 2009
Location: Santa Barbara

Posts: 686
iTrader: (1)

Quote:
Originally Posted by Spoolin1 View Post
I tried and even told them that I'll be back as soon as the CEL comes on and it goes out, so it's a little ridiculous to not go ahead and change it out beforehand if you know it'll go out eventually.
The problem with that solution is that the 29F3 fault will not usually ever set a check engine light at all. Usually it's a "hard" fault and the low-side fuel pressure reading defaults to a substitute value -- which means the DME doesn't know the true pressure in the low-pressure fuel system. This could affect how the engine starts, how the DME controls the fuel pump, and other possible performance issues.

I'd replace it ASAP if it were my car -- be it out of my own pocket or not.
__________________
BMWM.D. is offline  
0
Reply With Quote
      02-08-2013, 09:52 PM   #15
maximum96
New Member
 
Drives: 08 e60
Join Date: Apr 2012
Location: queens

Posts: 27
iTrader: (0)

Ive had the lpfs error for about a yyear and not able to clear, logging on the jb4 shows it pinned to the max value, never had a problem, just not able to log the lpfp. My question is, will the lpfp alwats be running at max potential, in theory decreasing the lpfp life? Never had a problem starting and always takes up to 40% e85 with 93 good....
maximum96 is offline  
0
Reply With Quote
      02-08-2013, 09:58 PM   #16
Spoolin1
Private First Class
 
Spoolin1's Avatar
 
Drives: 2007 335i
Join Date: Dec 2010
Location: Sellersburg, IN

Posts: 172
iTrader: (1)

Thanks guys. I may just go ahead and replace it then. Could you tell me the best place to get one cheap? Also, how soon until the new one may start having issues also? Is it pretty much a ~20k mile issue for regular swaps for a new one?
__________________
07 335i
-AMS intercooler with Cobb AP stage 1+ 93 tune.
02 Honda S2000
-741 whp 471 wtq (dynojet) @ 29.6 psi on e85; now on 34 psi, 800+ whp.
Spoolin1 is offline   United_States
0
Reply With Quote
      02-08-2013, 10:18 PM   #17
neilvosko
Major
 
neilvosko's Avatar
 
Drives: 335i e92 FBO
Join Date: Dec 2011
Location: miami

Posts: 1,398
iTrader: (16)

Yep, second cn555.
Change it for 80 bux shipped from turner or other BMW places, you will lean out at wot because the backup map the d e runs when that sensor is bad is not enough.
Mad props to Cn555, major contributor here
neilvosko is offline   United_States
0
Reply With Quote
      02-08-2013, 10:19 PM   #18
neilvosko
Major
 
neilvosko's Avatar
 
Drives: 335i e92 FBO
Join Date: Dec 2011
Location: miami

Posts: 1,398
iTrader: (16)

Quote:
Originally Posted by maximum96
Ive had the lpfs error for about a yyear and not able to clear, logging on the jb4 shows it pinned to the max value, never had a problem, just not able to log the lpfp. My question is, will the lpfp alwats be running at max potential, in theory decreasing the lpfp life? Never had a problem starting and always takes up to 40% e85 with 93 good....
Terry made a vid from bms, it's a base map that dme runs that leans out on e85 FBo car
neilvosko is offline   United_States
0
Reply With Quote
      02-09-2013, 03:26 PM   #19
Spoolin1
Private First Class
 
Spoolin1's Avatar
 
Drives: 2007 335i
Join Date: Dec 2010
Location: Sellersburg, IN

Posts: 172
iTrader: (1)

Is it the low fuel pressure sensor at turner motorsports; part number 13537614317? Its listed for ~$67.
__________________
07 335i
-AMS intercooler with Cobb AP stage 1+ 93 tune.
02 Honda S2000
-741 whp 471 wtq (dynojet) @ 29.6 psi on e85; now on 34 psi, 800+ whp.
Spoolin1 is offline   United_States
0
Reply With Quote
      02-09-2013, 03:38 PM   #20
maximum96
New Member
 
Drives: 08 e60
Join Date: Apr 2012
Location: queens

Posts: 27
iTrader: (0)

13537614317 yes
maximum96 is offline  
0
Reply With Quote
      02-09-2013, 09:35 PM   #21
Spoolin1
Private First Class
 
Spoolin1's Avatar
 
Drives: 2007 335i
Join Date: Dec 2010
Location: Sellersburg, IN

Posts: 172
iTrader: (1)

Cool; thanks bud.
__________________
07 335i
-AMS intercooler with Cobb AP stage 1+ 93 tune.
02 Honda S2000
-741 whp 471 wtq (dynojet) @ 29.6 psi on e85; now on 34 psi, 800+ whp.
Spoolin1 is offline   United_States
0
Reply With Quote
      02-09-2013, 10:28 PM   #22
neilvosko
Major
 
neilvosko's Avatar
 
Drives: 335i e92 FBO
Join Date: Dec 2011
Location: miami

Posts: 1,398
iTrader: (16)

13537614317
thats the one, make sure to get a free 2013 calendar with your order
neilvosko is offline   United_States
0
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Forum Jump


All times are GMT -5. The time now is 11:04 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST