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| 02-07-2020, 10:44 PM | #1 |
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P0171 & P0087 Codes for N55
2011 535i has low power, long start, and stalls at a stop sometimes. Does NOT feel like it's miss-firing and no misfire codes.
CEL on w/ P0171 and P0087, low fuel rail pressure and lean bank. There is so much out there on the HPFP and the LPFP having issues that it has my head spinning. Not to mention the fuel pressure sensors have issues too. Trying to determine a plan of action to diagnose the correct problem without replacing all three parts? I am getting DMTL short to positive codes also, but I think it's unrelated to my fuel pressure issue. |
| 02-10-2020, 09:18 PM | #2 |
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Turned out to be the HPFP. Replaced it, now all good.
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philipm78581.00 OnlyGerman362.00 |
| 02-12-2020, 08:32 AM | #4 |
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Do you know what failed on the HPFP? I see FCP Euro carries cam followers and seals etc... wondering if this happens what is the actual failed component
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2016 528iXDrive
1988 Carrera Coupe |
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| hpfp, loss of power, lpfp, stalling |
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