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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > 29f3 code...solutions?...please help low pressure fuel sensor



View Poll Results: 29F3 Low Pressure fuel sensor code..tune? ....Fixed?
29F3 LP fuel sensor code with Tune, Fixed 6 33.33%
29F3 LP fuel sensor with Tune, wont go away 10 55.56%
29F3 LP fuel sensor code Stock, Fixed 1 5.56%
29F3 LP fuel sensor code Stock, wont go away 1 5.56%
Voters: 18. You may not vote on this poll

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      12-05-2012, 04:47 AM   #23
kelvin2010
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Quote:
Originally Posted by neilvosko View Post
how did you get warranty work since there is no SES light?
are you FBo?

There is SES light for the 29F3 (I guess because I have catless downpipe, the SES is on all the time)
I checked the error code because I found out every time I start up the car, the RPM is very unstable for the first few seconds...
And yes, I am FBO..
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      12-05-2012, 09:04 AM   #24
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I replaced my sensor last night and did a couple of 3rd gear pulls afterwards. The 29F3 and 2AAF codes are gone and my AP is properly logging the LPFP again. Not an overly difficult job but it does get tight when it comes time to remove the sensor if you have normal size hands.
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      12-05-2012, 06:01 PM   #25
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it's a lot easier if you take off the intake manifold, at least for me it was. i don't have normal sized hands i have a little bit bigger than normal sized hands and i couldn't pop the electrical piece off of the sensor.
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      12-05-2012, 11:54 PM   #26
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Erm..... Have done hundreds of these things..... They take like 20 minutes!


Just pop the black box off the metal tang and take off the sensor.
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      12-06-2012, 12:00 AM   #27
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Quote:
Originally Posted by Bigugly View Post
Erm..... Have done hundreds of these things..... They take like 20 minutes!


Just pop the black box off the metal tang and take off the sensor.
Whats your trick since you have done hundreds of them to take that junction box off the manifold???? I tried for awhile and couldnt take it off so I just left it on and lifted the manifold until I was able to see the sensor and fit a 13/16 wrench in there.
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      12-06-2012, 12:15 AM   #28
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Pry bar, common sense and finesse. You need all three if you want it to come off easily.
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      12-06-2012, 10:24 AM   #29
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Quote:
Originally Posted by Bigugly View Post
Pry bar, common sense and finesse. You need all three if you want it to come off easily.
+1 on the pry bar, works perfectly.
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      12-06-2012, 10:30 AM   #30
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I literally got my hand under and behind the junction box and it pulled right now. That was the easy part of the job for me.
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      12-06-2012, 05:43 PM   #31
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hmmm, dealer says the LPF sensor needs to be coded to the car. Quoted me $650 to replace and "code", lol.
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      12-06-2012, 05:59 PM   #32
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Quote:
Originally Posted by R 4 5 T 4 M 4 N View Post
hmmm, dealer says the LPF sensor needs to be coded to the car. Quoted me $650 to replace and "code", lol.
Doesn't require coding per se......but it is very helpful to clear out the long term fuel adaptations after replacing
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      12-06-2012, 06:08 PM   #33
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Anyone got a part number? I've been recently seeing this code come up on my car.
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      12-07-2012, 12:40 AM   #34
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ecu

can the ecu be reset? like via COBB? or adaptations reset via JB4?

can someone help on what is needed to reset without the dealer?


and how to reset?

car off?


Quote:
Originally Posted by Ilma View Post
Doesn't require coding per se......but it is very helpful to clear out the long term fuel adaptations after replacing
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      12-07-2012, 08:57 AM   #35
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The BT tool allows you to reset adaptions. It can also be done through INPA. I'm not sure how many adaption resets the JB4 can do.
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      12-07-2012, 09:38 PM   #36
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i used the cobb, hope it works.
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      12-08-2012, 11:21 AM   #37
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I did not do any such reset, car performed flawlessly after changing an obviously defective sensor. It was stuck at 6.5bar (6500hPa), not moving. Later I also replaced the LPFP as a preventive measure.
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      01-03-2013, 06:15 PM   #38
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Quote:
Originally Posted by kelvin2010 View Post
I found out every time I start up the car, the RPM is very unstable for the first few seconds...
And yes, I am FBO..
+1, sounded like my car has asthma. Just started today.
Quote:
Originally Posted by AcExSpades View Post
Anyone got a part number? I've been recently seeing this code come up on my car.
+1, I have an appointment for Saturday. Depending how much I'm quoted, I might be doing this on my own. The crazy thing is this happened after I stop running an e85 mix.
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      01-03-2013, 09:35 PM   #39
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Dealers is going to charge you at least a 500 possibly more
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      01-03-2013, 11:59 PM   #40
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Quote:
Originally Posted by cn555ic View Post
Dealers is going to charge you at least a 500 possibly more
To replace the sensor? will be my reaction as I walk out the door. Guess I'll cancel my appointment tomorrow and try to find that sensor. Thanks.
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      01-04-2013, 04:18 PM   #41
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Quote:
Originally Posted by AcExSpades View Post
Anyone got a part number? I've been recently seeing this code come up on my car.
13 53 7 614 317, just picked one up from the dealer for about $120. Will make a DIY soon whenever I get some free time since it sounds easy to do.
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      01-04-2013, 04:30 PM   #42
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Damn 120 bucks. Why so much. I paid 67 bucks with mechanics discount without it is 79. You got raped.
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      01-04-2013, 04:31 PM   #43
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Damn 120 bucks. Why so much. I paid 67 bucks with mechanics discount without it is 79. You got raped.
I was thinking the same thing.
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      01-04-2013, 06:14 PM   #44
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I also threw P2AAF and 29F3 starting a few weeks ago. 2010 E92 N54 45kmi, Cobb stage 1 Agg. Initially dealership said P2AAF didn't require action.

Then over the holidays I was literally driving 1 block from dealership when car went into failsafe. Pulled over and saw P2AAF and P29F3 on Cobb, in addition to a new P29DC. Obviously a fuel issue. I was able to limp up the street to the dealer.

They replaced low pressure fuel sensor and now all is well. My SA said that this is "becoming very common". Seems like a lot of people are having this issue. Is there a recall on this part?
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