Stock Problems/Issues Discussions related to warranty related issues and repairs, or other problems with the OEM parts and software for MINI Clubman (R55), Cooper and Cooper S(R56), and Cabrio (R57).

N18 HPFP maybe nuked itself

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Old Sep 21, 2025 | 05:23 PM
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WillCucco's Avatar
WillCucco
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2nd Gear
Joined: Aug 2024
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From: Boise, ID
N18 HPFP maybe nuked itself

Hey all, I was driving along yesterday when all of a sudden I got the limp mode light and my car started lurching. I pulled over immediately and my car basically stalled (even though it's an auto). Checked the codes right away with my Foxwell code reader and got a bunch of different codes, but the most plausible ones are the "2BE9 Cylinder injection cutout: Pressure too low in high- pressure fuel system" and "2CO1 High pressure fuel, plausibility Pressure too low" (I also got a couple FRM codes but they don't appear to relate to this issue).

I've read a couple forums of this issue on here and on Reddit, and pretty much immediately found out that it's the HPFP - However, the weird part is that when I cold started my car this morning, I checked my fuel rail pressure and it was totally fine, 1200 psi on startup and 1700 psi while cruising. Others with HPFP issues seem to have persistent fuel rail pressure issues (at least until the engine warms up it seems), but mine seemed to go away. Anybody know what this could be, or experienced this same exact scenario to me? Is it possible that this could be a one time issue where the fuel pump just hiccupped?

Any help would be greatly appreciated!!

**I also posted this in the R56 Hatch Talk forum, but since this is a potentially big issue for my daily, I want a little more visibility**
 
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