P0171 / P0174 Only when low fuel level in tank

[JP-X3]

I has happened three times within the last 2 months on my 2005 X3 E83 with A/T. I plugged the scan tool and cleared the SES light then it goes back to normal only if there's enough fuel in the tank.

I checked vacuum lines, cleaned MAF just in case but I suspect that the problem is low fuel pressure caused by dirty fuel filter (56K miles and never changed). I will replace the filter the first weekend of March because work / life is too busy nowadays.

MPG and performance have not changed.
Has anybody experienced this?

[JCL]

I'd listen to Weasel.

http://www.xoutpost.com/bmw-sav-foru...300-p0302.html

Just checked and there are lots of threads with resolutions if you search on p0171 and p0174.

[JP-X3]

Late Update: I replaced the fuel filter and all the problems were gone. I managed to remove the ring using a big screwdriver covered with electrical tape and a hammer but do not advise to do this: undoing it was not easy and tightening it back was more difficult. The ring will need to be replaced, it will not stand another open / close procedure

[dodoni1]

Originally Posted by JP-X3

I has happened three times within the last 2 months on my 2005 X3 E83 with A/T. I plugged the scan tool and cleared the SES light then it goes back to normal only if there's enough fuel in the tank.

I checked vacuum lines, cleaned MAF just in case but I suspect that the problem is low fuel pressure caused by dirty fuel filter (56K miles and never changed). I will replace the filter the first weekend of March because work / life is too busy nowadays.

MPG and performance have not changed.
Has anybody experienced this?

maybe you should to get a car diagnostic tool to check your car.