1999 E46 318 Touring - Check fuel supply system?

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  1. 1999 E46 318 Touring - Check fuel supply system? FIXED 
    #1
    BMW Crazed
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    markyp's Car Details
    Model of Car:
    318 SE
    Year of Manufacture:
    1999
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    Can anybody suggest where to start looking to fix this fault (code came from a Peake fx5 - table 27 code Ab). My car has recently returned from main dealer after having the rear subframe mounts replaced (many thanks to this forum for all invaluable information) I now, occasionally get the engine management system light on, usually after a good run when the car comes to idle. The car shows no sign of problems physically - just the warning light.
    Returned car to BMW they have checked and said tank and all ancilliaries have been put back correctly - don't know wether they looked at codes because the light was not on when it went back in.
    Easy to keep resetting fault (Peake tool is excellent) but would like to get to bottom of fault.
    Last edited by markyp; 13-10-2009 at 15:21.
     
     

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    xXxStKxXx's Car Details
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    Put the last 7 digits of your VIN in here then you can browse for the fuel supply system
    http://www.realoem.com/bmw/select.do
     
     

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    markyp (22-08-2009)

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    #3
    BMW Crazed
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    markyp's Car Details
    Model of Car:
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    Thanks for quick reply StK, have looked at realoem info and initially thought pump/sender but guess that would show in poor running, would a dirty fuel filter produce a code? filter less than year old but maybe after tank was removed debris got in.
     
     

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    Fault code 171 mixture too lean or P0170 Fuel trim bank 1 malfunction. Most likely you have a air leak after the Air flow meter or before the Lambda sensor.
     
     

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    markyp (09-09-2009)

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    Thanks Ronnie, thats a new area for me to look at. Out of interest how do you get "Fault code 171 mixture too lean or P0170 Fuel trim bank 1 malfunction"
     
     

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    #6
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    markyp's Car Details
    Model of Car:
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    Looks like I fixed the fault, going along the lines of what Ronnie said I started looking at possibility of air leak, pipework all looked ok, but I've allways had the infamous secondary air pump 'HISSSSSS' on start-up, thought it was normal, untill I heard another car and realised my car was much louder. Decided to tackle this job by replacing bust rivets on top of black cylinder with nuts and bolts (links on this site for a 'how to') easy job - now much quieter, and no more EML light on.
    Last edited by markyp; 13-10-2009 at 16:01.
     
     

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    xXxStKxXx (13-10-2009)

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