N54 hpfp codes I dont have any additional mods, so I run stage 1 and I drive mildly. How old is your hpfp? Mar 13, 2022 · I've been searching for any help at all on my cold start issue across Google, YouTube, and various N54-related forums, but found nothing consistent with my Oct 8, 2018 · 2006 335xi automatic. 2 days free shipping for high-quality n54 high pressure fuel pump, fix bmw normal hard starting issue. On an N54, there’s a low-pressure fuel pump and a high-pressure fuel pump. Apr 28, 2015 · N54 HPFP and LPFP - what to look for in your logs May 22, 2019 · It could be lots of things, including voltage fluctuations. Replacing the High Pressure Fuel Pump (HPFP) fixed this issue and car is pulling great now! Replace HPFP - • Bmw 335i N54 Ultimate HPFP Replacement Gui Jun 16, 2021 · High-Pressure Fuel Pump (HPFP) Failure: The high-pressure fuel pump is another common failure item with the N54. Feb 1, 2010 · Official "HPFP" Questions and Answers thread ("Engine Failure - Reduced Power" error) In an effort to plug the proliferation of high-pressure fuel pump (aka "HPFP") posts, we are going to build a single Q&A post that will help by objectively answer all of the questions. I have codes 29f2 and 29e2. scanned, shows: code 2AAF "DME: Fuel Pump, plausibility". BMW N54 owners who learn about the various symptoms combined with diagnostic fault codes and available remedies will protect themselves from future severe problems. When the HPFP starts to fail, it's common for the car to go into limp mode, and in severe cases can leave you stranded waiting for a tow. Installed it and worked great for about 10 miles. Chief among these is the N54 fuel pump, formally known as the High-Pressure Fuel Pump (HPFP). The time now is 08:07 AM. Is it a CEL The N54 twin-turbo inline-six engine, found in BMW models like the 135i, 335i, 535i, and others from roughly 2006 to 2010, is renowned for its potential but plagued by specific weaknesses. The time now is 03:10 AM. not doing me any good sitting here. Hello all! I was hoping someone with an N54 might help me here. These codes apply to the 135i, 1M, 335i, 535i, X6 and Z4 powered by the N54. The exact cause of N54 HPFP failure is not clear-cut, but it is believed to be a combination of factors. Nothing really strange with the car while driving, but I have been noticing that the car is spitting what appears to be fuel (doesn’t smell like fuel tbh) at cold start. 29F2: High pressure pump / open loop set May 17, 2025 · This guide provides a comprehensive walkthrough on how to rebuild the high-pressure fuel pump (HPFP) used in BMW N54 and N55 engines, specifically in the 335i, 335xi (E90/E92), E82 135i, and E60 models. If you are looking for more detailed information about some of the N54 engine problems listed in this guide, check out our BMW N54 Common Problems Guide. The time now is . Jan 16, 2025 · Explore common BMW N54 engine problems, their symptoms, and potential consequences to stay informed and maintain performance. This post will be Jan 31, 2019 · One of the most common failures on all BMWs with the N54 (and early N55) engine is the high-pressure fuel pump, regularly referred to as the HPFP. Is my HPFP going out?All times are GMT -5. I don't recall any where it was wiring or a fuse, but that obviously doesn't mean wiring or a fuse aren't your problem. us My Yahoo! Apr 30, 2022 · I'm seeing conflicting info on this code. 2FDB: Fuel High Pressure nach Freigabe der Einspritzung (apparently means “no rising May 14, 2025 · I'm n55 and have the new style hpfp, but of all the n54 threads I've seen, there are countless cases of hpfp's going bad. A common source of performance issues on N54 powered BMW's and early production N55 engines, includes o-ring p/n 13517571363 High pressure fuel pumps, or more simply HPFP's, are a common trouble item on N54 powered BMW's. Radiator fans turn to max and idle remains at 800 RPM. . Failure leads to drivability issues ranging from long cranking times and misfires to complete engine shutdown. amazon. I want to address anything before I start. So recently my car has been feeling horrible and having symptoms of HPFP failure :( : 1. the harder the lateral forces, the more it misfires. This causes the car to blast the radiator fan to full power and go into limp mode. If I shut'er down and restart it will usually be less rough but eventually smooth out. Check fuel pump wiring harnesses for damage or poor connections. Stopped car and restarted. once I Codes - HPFP - n54 stuff - ugh. it ended up being the EKPM3 overheating, so the hpfp i pulled should be fine (pulled at 28k iirc) if you want to pitch me a few bucks for them both. The high-pressure fuel pump pressurizes fuel to 2-3,000 PSI so that it can be injected into a fully-compressed ignition cycle and atomized properly. Mar 31, 2025 · One of the most notorious problems is high pressure fuel pump N54 failure. I have a 2008 335i (N54). I really baby the car and punch it once in a blue moon. description: I am getting an occasional misfire when turning right. Oh and another thing. Found in popular BMWs like the 2007-2010 135i, 335i, 535i, and Z4 sDrive35i, the N54's twin-turbocharged performance comes with this inherent Achilles' heel. Recognizing symptoms early and understanding replacement options are essential for m The N54 engine's high-pressure fuel pump (HPFP) is arguably its most critical weak point, and proactive replacement is often necessary rather than optional. If you have a new HPFP then it's most likely voltage fluctuation because the pumps depend on the EKPM units for control which in turn are super sensitive to voltage variation and will affect the pumps and when the pumps are affected the ECU will note that and throw a code. May 22, 2021 · A faulty HPFP does not inject enough fuel for combustion, thereby causing a stalled BMW engine. High five. 0-liter engine. Rail pressure was solid at about 2250 psi with accelerated slammed. icio. BMW has had Need To Change Your BMW N54 Injectors? Watch This DIY First! In this video, I’ll share BMW N54 HPFP FAILURE Symptoms/Codes! CLICK HERE To Shop On My BMW Fanatic Amazon Website! Mar 7, 2015 · I know there are thousands of threads about the high-pressure fuel pump (HPFP) and that it fails. I bought the reman n54 hpfp. The high-pressure fuel pump sits on the driver's side of the engine, beneath the intake manifold. Nov 9, 2017 · Helping a buddy with his 2007 N54. often when accelerating errors comes up; "Reduced Engine Power" and SES light come up. Directly from osias fuel pump factory. So it may appear to be a bad pump when in fact it may be Nov 24, 2020 · Hey there lads. Logs were showing hpfp crapped out and codes corroborated it. Includes every thing needed to replace a failed HPFP. Under HPFP failure FAQ!All times are GMT -5. It starts but with a really rough idle and goes immediately into limp mode throwing only one code. Jul 25, 2021 · MHD Stage 2+ (Error Code: 29F2) (Shadow Codes: 2FCA / 2FDA)All times are GMT -5. I can temporarily solve this by shutting the car off and on again. So I was doing a test drive and logging, and this shadow code appeared. However, its highly adv Code 29DC indicates low fuel pressure, often linked to the low-pressure fuel pump (LPFP) or high-pressure fuel pump (HPFP). Understanding the High-Pressure Fuel Pump N54 Problem Cold start up is very rough, RPM goes high (1,900) then low (600) and and then back up (1,300) upon a code 29F2 (High pressure pump / open loop set too high) being thrown with an engine malfunction screen. The N54's twin-turbocharged inline-six engine is renowned for its immense tuning potential. The time now is 09:18 AM. 😒 I've had the car for 2 months and it's been nothing but a headache. 4. Gassing it on the way back from the test drive car Jan 6, 2020 · 2008 535i, N54 engine, 140k miles. For MSD81, is it a crankshaft or an hpfp code? N54 Help! Problems with turbos, HPFP, injectors? VERY detailed question Nov 19, 2020 · N55 HPFP replacementAll times are GMT -5. Dec 13, 2017 · In this post, we will cover several common fault codes for the BMW N54 twin-turbo engine. 3. N55 HPFP Failure?BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i) > Technical / Specific Topics > 135i Turbo Engine (N54 / N55), Exhaust and Drivetrain Modifications N55 HPFP Failure? The BMW N54 engine is known for high-pressure fuel pump (HPFP) failures, leading to hard starts, misfires, and fuel pressure issues under boost. The time now is 08:27 PM. The 2020 saga of my 2008 E93/N54All times are GMT -5. Feels like misfires when under mild acceleration. Code popped for fuel pressure. May 22, 2024 · The most affected models include various BMWs with N54 engines, but any vehicle with an N54 engine or early N55 engine is prone to HPFP failure. The time now is 08:43 AM. Look at the signs of its failure here for early correction. The BMW N54 engine's high-pressure fuel pump (HPFP) is a well-known weak point frequently requiring replacement due to internal wear or failure, leading to symptoms like hard starting, loss of power, engine stalling, and misfire codes. Never thought I would have to post on forums for help but here I am. Additionally, certain fault codes may apply to various non-N54 engines. I was told the lpfp had starved the hpfp which is why it threw the code (hpfp was still under BMW warranty which sounded fishy) however it worked. Nov 20, 2020 · Rail pressure drops and matches the low-pressure fuel pump (85 psi). Odd high pitched siren/whistle sound when under acceleration and metal clank noise? In this video, I’ll share BMW N54 HPFP FAILURE Symptoms/Codes! CLICK HERE To Shop On My BMW Fanatic Amazon Website! Thanks for the support!👉🏻 https://www. 29f2 code - replaced almost all fuel parts am I missing something?All times are GMT -5. Valve cover also replaced same day. Apr 10, 2023 · « Previous Thread Next Thread » Realistic aftermarket HPFP options for 218K mile N54? BMW high pressure fuel pump (HPFP) failure typically manifests through distinct symptoms including extended cranking/rough cold starts, significant power loss or hesitation (especially under acceleration), engine stalling (randomly or after startup), illumination of the Check Engine Light (CEL) with fuel pressure codes Anecdotal. Dec 3, 2022 · So I changed my HPFP and it ran nice and smooth for a couple weeks I would say but out of no where my pressure for the high side dropped out of no where. Despite replacing LPFP, HPFP, fuel filter, throttle body, plugs, coils, and DME, persistent faults suggest wiring issues or fuel pressure sensor faults. « Previous Thread Next Thread » O2 sensor mixed up codes solved A Genuine BMW High Pressure Fuel Pump, as used on N54 and Early N55 models. I've already put over 2000 into repairs on this thing. com/shop/bmwfanatic My Sep 1, 2023 · The BMW N54 has two separate fuel pumps: a high-pressure fuel pump (HPFP) and a low-pressure fuel pump (LPFP). This OEM-style replacement HPFP is a direct fit for all N54-powered BMW models, restoring factory performance, reliability, and smooth acceleration. Rough cold start 2. For any serious BMW N54 engine enthusiast looking to unlock reliable performance or combat frustrating failures, upgrading the high-pressure fuel pump (HPFP) isn't just an option – it's a fundamental necessity. It started just fine What are the first signs of your high pressure fuel pump dying on the n54? I have a 09 335xi and I'm pretty sure mine isn't even covered by the recall. recent work completed related to misfires: low pressure fuel sensor, new plugs, new coils, new turbos, new o2 sensors. Could they even be anything other than the hpfp? The car feels like it's misfiring at « Previous Thread Next Thread » N54 Code 29DC Cylinder injection switch off Let’s start with statistics – my experience, performing diagnostics of several thousand N43/N53/N54/N55 series engine in the presence and also remotely, has confirmed, that HPFP is a very safe hub. If I accelerate for N54 codes 2B2C and 29F2, HPFP issue?twitter Facebook Digg Google StumbleUpon del. The critical reality for N54 owners i BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i) > Technical / Specific Topics > 135i Turbo Engine (N54 / N55), Exhaust and Drivetrain Modifications RESOLVED! 29E2 and 29F2 Codes and Half Engine Limp Mode May 22, 2024 · What are the most common N54 engine problems? Read our guide and learn how to minimize the chances of costly engine failure on your 135i, 335i, or 535i! Jan 11, 2020 · How to diagnose and repair an N54 30FF engine code. 300F engine codes signify blown turbochargers or bad boost solenoids. This is a critical component on these turbo applications, often referred to simply as the HPFP. May 18, 2021 · It usually throws a HPFP code (29F2) but if I clear it and it starts normal, there is no code. Lpfp and hpfp sensors? also, i’ve got an extra hpfp and hpfp sensor from when i was troubleshooting similar issues with my 2011 335is. On the JB4 it’s showing just 1 PSI. Was putting it through its passes and all of the sudden the hpfp started to struggle (thankfully I wasn’t leaning into it much when it started stumbling). I want to add pipes and a FMIC now that Ive decided to keep the car for a few years and just drive it sparingly (3-4 miles a summer). 10X Entries For Our G87 M2 Sweepstakes! DIY: N54 HPFP Replacement - Page 3All times are GMT -5. Multiple Misfire Codes - Sparkplugs, Coils, HPFP?BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i) > Technical / Specific Topics > Maintenance (Oil, Fluids, Break-In) / Servicing / Warranty Multiple Misfire Codes - Sparkplugs, Coils, HPFP? Error code 29F2 - AdviceAll times are GMT -5. Primed the pump, test drove it and no issues. The time now is 02:03 AM. Includes new high and low pressure fuel sensors, gaskets, and Genuine BMW pump. The N54 high pressure fuel pump (HPFP) is arguably the most critical, yet frequently problematic, component on BMW's revered twin-turbocharged 3. If it's not working at peak/optimum pumping capacity, it will immediately trigger check engine / drivetrain malfunction codes, or leave you stranded waiting for a tow truck. So, a few hours later a new pump was swapped in. « Previous Thread Next Thread » Codes - HPFP - n54 stuff - ugh. Jul 1, 2025 · The high-pressure fuel pump (HPFP) is a critical, yet commonly problematic, component on BMW's N54 twin-turbocharged engine. what can be the issues ? Jan 27, 2025 · N54 - HPFP? All times are GMT -5. Installed in numerous 2006-2010 BMW 135i, 335i, 535i, X6, and Z4 models, the N54 engine revolutionized BMW's approach to turbocharging. Mar 28, 2025 · Explore common problems with the BMW N54 engine, their symptoms, and effective solutions for maintaining performance. Jun 9, 2023 · Common N54 HPFP Failure Fault Codes Along with the physical symptoms that we listed above, there are moreover some worldwide BMW fault codes that commonly surface if there is an issue with your N54’s high-pressure fuel pump. But that is exactly the problem: After browsing so many search hits, I have not been able to find a conclusive description of the early symptoms or the typical chronology of a failure. However, its Achi It originally threw a hpfp code which started the whole dealer adventure. The time now is 05:42 PM. May 1, 2018 · DIY: N54 HPFP ReplacementAll times are GMT -5. axj bgn tbzfd ylworbe hdzc qrpr yapjrybw noh angex ckxr gnqlel jbhvlfu btil fzvb pxrhkva