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Error code 29F2 - Advice
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12-16-2012, 06:21 AM | #1 |
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Error code 29F2 - Advice
Hi guys/girls, I've just bought an evolve r-cable to get my 2007 335i remaped...however I have the 29F2 error code.
"1) 29F2 fuel high pressure system, fuel pressure" I have cleared the error, run the car for a week and its come back. It seems to occure when I have had a spirited drive home, and it occurs the next morning. Only happened twice but on startup it says "reduced power..". I re-start the car and its fine. So, I believe I need to get the car sorted before the remap...(note, car has had the bmw firmware fix released a few years ago). The bmw independant specialist advised me it could be the HFP sensor which would cost £100 to fix plus an Autologic code read (extra £50!). Do I need that extra code read? they say it gives them more detail to diagnose. Also, if its not a sensor...and turns out to be the pump, is it worth getting a warrenty to cover it? (costs alot to fix?) Advice really welcome here. Thanks Matt |
12-16-2012, 07:28 AM | #2 |
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Remove everything and dealer it.
Hpfp is around £500 inc fitting. Don't waste money if you have a warranty..
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12-16-2012, 08:51 AM | #3 | |
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The code for a faulty low pressure sensor will normally be 29F3, but it's possibly that a sensor not performing 100% would cause the low pressure fuel pump not to deliver enough fuel to the HPFP. AFAIK, the sensor is fairly cheap, but it's a pain to get to. I just wouldn't expect this to only be the case when it's cold. If the sensor was going I would expect this also to happen when at WOT. Anyway, the low pressure sensor #7 in the link below: http://www.realoem.com/bmw/showparts...83&hg=13&fg=15 Replacing it is a different story. You need to remove the airbox, throttle body & intake as the sensor is hidden under the intake. The fuzzy pictures from this post may give you an idea: http://www.e90post.com/forums/showpo...8&postcount=50 I all honesty £100+£50 to replace the sensor doesn't sound all that bad if parts (sensor + intake gaskets) are included in that price. It's probably an hour's work to replace with diagnosing and replacing the part. BMW will charge that just to look at it. Only issue with reverting to stock and dealering it, is that it may not trigger the code under these conditions. So you can either wait until it gets so bad that it fails under stock conditions or try a couple of things to fix it before going down this route. 1. Replace Low pressure sensor (~£150) 2. Update software on car (if on older revision that doesn't prime the pump) ~(£200) 3. Replace HPFP (~£500) |
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12-16-2012, 11:20 AM | #4 |
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When i had that code+ long crank start up+ car dies on morning start up bmw replaced injectors with new parts then problem all gone since
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12-16-2012, 12:01 PM | #5 |
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thanks guys, just for clarity, the car is standard now...i have not put the map on the car.
I dont have a warranty. how much could injectors set me back? would that be covered under a warranty? |
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12-16-2012, 01:00 PM | #6 |
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Maybe some of the 335i guys can advise but didn't BMW offer extended warranty cover on the hpfp issues as its a known issue
Don't want to get your hopes up, just thought I heard this |
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12-16-2012, 01:14 PM | #7 | |
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Only in the US due to the class action suit. AFAIK no other country are so lucky. |
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12-16-2012, 03:14 PM | #8 |
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Leave the injectors last!
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12-17-2012, 07:39 AM | #9 | |
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see here http://www.realoem.com/bmw/showparts...83&hg=13&fg=15 LPF sensor is item 7, HPFP complete is item 1. Does the engine suffer from the long cranking time on cold starts? or when warm after a spirited drive? Like a second or more of cranking before fire up? If so it's 99% sure to be HPFP on its way out. Very common unfortunately, in fact is there a single 335i on here that HASN'T had a new HPFP (some more than 1). Also, how did you read the codes? do you have a BT leads, or does the evolve lead let you do this? Does it give full BMW code readouts or a restricted selection? Last edited by doughboy; 12-17-2012 at 07:50 AM.. |
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12-17-2012, 04:09 PM | #10 |
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So either way, I have to get it fixed at my own cost...damn.
Forgive my nievity...what is a "long cranking time on cold starts" ? I used the Evolve cable - it says exactly as follows: // BMW Trouble Code list // // ECU Type : Siemens DME MSD80 // Vehicle Manufacturer Ecu Hardware Number : 7611397 // Vehicle Manufacturer Ecu Software Number : 7583351 // Hardware Reference Number : 0044DC0I8A0SWTD1S // Ecu Manufacturing Date : 18.09.2007 // // 1) 29F2 fuel high pressure system, fuel pressure |
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12-17-2012, 04:42 PM | #11 |
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There are few videos on youtube showing you long cranking time....search for n54 hpfp failure/ cranking time...
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12-18-2012, 05:10 AM | #12 | |
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+1 google / youtube it, it's the main giveaway to a failing HPFP, as discovered by the many tens of thousands that have failed.... |
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12-18-2012, 06:29 AM | #13 |
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As 335rocks says it could be the map.
I'd be contacting Evolve for advice before replacing hardware...
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12-18-2012, 08:20 AM | #15 |
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Ah I mis-read it..
Probably HPFP needs to be replaced. Depending upon the mileage, I'd get the Intake Valves cleaned at the same time!!
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12-18-2012, 12:22 PM | #16 |
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Ah me too. In that case most likely the pump. However it doesn't help the OP as he is still out of warranty.
OP does your current software prime the fuel pump and do you hear a whine when you unlock the car? As Phil200tdi mentioned, this is a good time to get the intake valves cleaned. Definitely worth considering. |
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12-18-2012, 12:23 PM | #17 |
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Send it to Darren Woods!....
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07-09-2020, 11:44 AM | #18 |
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HPFP or Fuel Injectors?
How could we determine which is the culprit?
I've read some other threads that advise this is likely due to carbon buildup on the injectors... I have the same issue on cold starts there's stuttering and eventually gets going fine. Once it did give me the engine limp mode but usually if I shut it off and turn it back on it works fine when warmed up. Service engine soon light does come on also... error code 29F2 is consistently present (I've been clearing this lately to see if any other errors pop up but none have) Thanks |
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