[jmaniccia]

I replaced the hpfp on my '11 E92 N55 less than a year ago, with a new BMW part (also replaced hp fuel sensor with Bosch). All problems solved since then - half-engine light, limp home mode, error codes - been running perfectly.

Half-engine light/limp home mode came back today. Most consistent error code (Foxwell scanner w/BMW programming) is 2BEE "High fuel pressure plausibility, cold start Pressure too low". I'll get that just starting it; if I put it under a load I'll get one other pressure code, and a few misfire codes.

Checking live data with the Foxwell I see fuel pressure (high pressure) drop to ~0.67 MPa. (supposed to be 5 or 6, I think). Problem appears intermittent, as I've observed it at 5, then seen it drop to 0.67 and limp home mode then comes on at the same time.

It seems like hpfp again, but I *just* replaced that last August, with a new BMW part from a BMW dealer. Lpfp and fuel filter replaced August 2021; coils April 2021; spark plugs August 2020. Drive about 15k mi/year.

Whattaya think?

[whyzee125]

I agree that it seems to point to the new HPFP failing already.

The good news is that with genuine BMW parts purchased from the dealer, if you take it in and it's determined to be failing, they'll cover parts AND labor (if I understand their weird warranty correctly).

[jmaniccia]

Yeah, I have a message in to them. It could be a known thing, and they just replace them. Had that recently with a headlight casing: they’re known to have leaks, but BMW won’t improve manufacturing, they just replace them under warranty. Took me three tries to get a good one.

[jmaniccia]

Just closing this out, for anyone who finds this thread. Yes, this is in fact a defective hpfp, it is covered by BMW 2-year warranty and my local dealership is replacing it free of charge. Had the hpfp not been the cause of my symptoms, I would have been on the hook for their diagnostic fee of $240.

Worth noting: when researching the job last year, all the advice online was to buy a new BMW part, as aftermarket and rebuilds were known to fail. My new BMW part from a BMW dealership failed in less than 12 months. Just FYI.

[wrevilo]

Glad it is sorted, the HPFPs are a nightmare. I had to do mine this year too and went with a used part.

[whyzee125]

Nice, glad they covered it! Bad new parts are definitely a thing

[lookalikehuuh]

Originally Posted by whyzee125

Nice, glad they covered it! Bad new parts are definitely a thing

Interestingly, this past Friday I was on my way to the docks for my 3 day fishing trip (wife was dropping me off). We happened upon a 335i coupe that was disabled in the 2nd lane on the street so we turned around and I got out to help the older gentleman push the car out of the road. We got it pushed out of the road and into a gas station parking lot where he could wait for AAA to come pick up his car.

Turns out he had just had the HPFP replaced at the stealership like 9 months prior and it wasn't building pressure again so he wasn't able to keep the engine running for longer than like 2 seconds.

2 does not a trend make, but maybe there was a bad batch of HPFPs that dealers got around the country?