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Old 01-21-2011, 03:48 PM
JP-X3 JP-X3 is offline
Join Date: Jan 2011
Location: Houston, TX
Posts: 26
JP-X3 is on a distinguished road
P0171 / P0174 Only when low fuel level in tank

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?
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