1999 E46 318i se fault code p0171. - Page 2

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  1.  
    #11
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    Jayp07's Car Details
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    I have this code come up too on carsoft, 171 fuel supply system - along with 141 lamda regulation... I recently changed my MAF which brought back the power... 1 day after clearing all codes i still get the 141 error but that doesn't turn the light on by itself. Something else is going on that brought up the 171 code previously. Call me a pessimist but I'm expecting the mil to come back on within the week and the 171 code to return... reason being that I get problems with my idle... my next move was going to be the O2 sensors... I will post up if it comes back! If by any luck it stays off then in my case i was a faulty MAF contributing to the 171 code.
    2000 E46 318i Auto
     
     

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    #12
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    gazzer01278's Car Details
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    another bottle of sdp injection cleaner, and another visit to the garage left with garage who had several runs. put once more on the computer and garage found nothing all appears normal,have had car back after one more bottle of injection cleaner gave car goon run 300 miles round trip car did seem to run ok whilst on holiday still in my view lacking slight power but didn't notice any hesitation untill i next trip out when put foot down from cold in first gear the next day back from holiday and hesitated again...
    was told by indi if something is wrong fault will develop and should be easier to find the cause as nothing showing and no fault codes......
     
     

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    #13
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    Any Idea on this P0171 code issue, I've been told so many things to look @ change, can't be throwing money away in this day n age!!

    I was going to change plugs & fuel filter!!

    Cheers
     
     

  6. hesitating when cold 
    #14
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    i still also have this problem when engine cold it shows more then got use to it will have to sort but so far hasnt got any worse.
    will the fuel filter change be a good start??
     
     

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    #15
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    Guys, I've the same code p0171, comes up at random every few weeks after it's been cleared. Been off a while last night turned heating on driving around 20 MPH in 3rd and light pops up.

    Any suggestions please how to fix

    It has come up 4 times, each time cleared then pops back up after a few weeks. Not sure how to fix....
     
     

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    #16
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    It's not like me to leave a problem unanswered, if memory serves me correct my light stayed off once i replaced the MAF with a brand new genuine bosch replacement. The light has not come on since... I still struggle with plugging all the air leaks and achieving a consistent smooth idle but that hasn't brought the light on since then. Cleaning the MAF didn't work for me and don't be tempted to buy cheaper alternatives than original.... hope this helps
    2000 E46 318i Auto
     
     

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    #17
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    Quote Originally Posted by Jayp07 View Post
    It's not like me to leave a problem unanswered, if memory serves me correct my light stayed off once i replaced the MAF with a brand new genuine bosch replacement. The light has not come on since... I still struggle with plugging all the air leaks and achieving a consistent smooth idle but that hasn't brought the light on since then. Cleaning the MAF didn't work for me and don't be tempted to buy cheaper alternatives than original.... hope this helps
    Thanks, that doers help. Car used to idle rough, slightly smoother strangely after the code came up and was cleared.

    Local garage say's its the Lambda sensor? I am unsure as this code relates closely to the MAF.

    Another option would be to wait till the code comes up again, Am I right in saying the fault code can be broken down to pin point fault diagnosis when it lights up?

    I wouldn't like to spend money on something when it could be another cause to the problem, I.e MAF or Lambda?

    What is your suggestion I do to save incurring further costs and to rectify the route problem.

    Cheers
     
     

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    #18
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    Lamda etc were also on my list of possible solutions... What i did before spending the money was disconnect the MAF and drive the car. The difference in power was huge! I felt better about risking the money after doing this, I didn't feel like i was working blind anymore.
    2000 E46 318i Auto
     
     

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    #19
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    Quote Originally Posted by Jayp07 View Post
    Lamda etc were also on my list of possible solutions... What i did before spending the money was disconnect the MAF and drive the car. The difference in power was huge! I felt better about risking the money after doing this, I didn't feel like i was working blind anymore.
    Where did you get yours from? how much are they to buy cheap
     
     

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    #20
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    I bought mine from a guy selling original parts on the net it was about £30/£40 cheaper than BMW, which I think was around £170... but you have to check its been a while now since i bought mine... cheap ones are all over ebay... just do a search and you'll see.
    2000 E46 318i Auto
     
     

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