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04-12-2018, 10:48 AM | #23 |
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Make sure the three check valves are functioning correctly and verify the pump is working correctly. Check also for wire damage and shorts.
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04-12-2018, 10:53 AM | #24 | |
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I guess I should listen for the pump upon start up. I'll check RealOEM for the part number and start shipping for a pump price.
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04-12-2018, 10:56 AM | #25 |
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I have all of these related parts used if it can help.
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04-12-2018, 12:04 PM | #26 | |
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04-12-2018, 12:05 PM | #27 |
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04-12-2018, 12:11 PM | #28 | |
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Yes I cleared the codes was all happy...for a moment. Went for a spin and then ping. Checked and same code. I used a new sensor yes, from ECS. Hmm I’ll dig around to see see what the error code usually is for the pump itself before ordering a replacement. It’s almost $500 USD, for a pump shipped to Canada so will see if I can pinpoint first. Thanks for the help! |
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04-12-2018, 12:13 PM | #29 | ||
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05-07-2018, 12:18 PM | #30 | |
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Knowing I still have the ICV, and throttle actuators to look forward to failing I'm beginning to get the impression the E90 M3 is plagued with gremlins and I might lose the enthusiasm I had on day one to garage her and keep it indefinitely as the last NA M. I haven't even cracked 115,000 km (~72k miles) yet. Combined with the death plummet in value of my 2017 i3, I'm seriously questioning why I have an F15 X5 inbound as my 3rd BMW... </RANT> Apologies.
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05-26-2018, 04:47 PM | #31 | |
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02-08-2019, 09:55 PM | #32 |
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This thread really helped me out. Reading everyones post and using all the tips. I was really dreading this as I have big hands and looking at the area I needed to access.
Glad to say, using a wire coat hanger, an extended flexible magnetic attachment, and a long flathead screw driver I was able to remove and reinstall the sensor in about 5 minutes. The good part? Never had to put my hands in that little area to get scratched up. |
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04-06-2020, 08:34 AM | #33 |
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Reviving this thread, I did not get a check engine code or limp mode but on occasion my brake pedal is so firm it can't be pushed down and my car won't start; I think because it doesn't know the brake is being pushed. Could this sensor be the culprit? If I wait 15 to 60 minutes the car will eventually just start working. The car could be sitting overnight or it has happened while getting gas. No trouble codes.
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05-07-2020, 04:33 PM | #34 | |
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Terry |
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05-07-2020, 05:53 PM | #35 |
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The vacuum pump had failed, and blown what I recall was fuse #69 (was listed under “fuel system” and I looked up via a wiring diagram). Finding this blown fuse was the crux of all troubleshooting. So new sensor, new vacuum pump and continuing problem (obviously) until the appropriate wiring diagram was able to lead me to the mislabeled fuse.
Honestly I would have saved time if I pulled every fuse one by one had I not had the wiring diagram of you add up all the head scratching. |
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07-02-2020, 05:10 PM | #36 | |
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Then a few days later the 27E4 CEL came on, limp mode home at 35mph. Read threads that said it was the brake vacuum sensor, ordered it and installed. Cleared code and took the car back out and after about 30 seconds, boom, CEL again..shit Back in the garage. Banging my head on what to do next I ran across your post and the note about the fuse, so I figured what the hell is worth a shot. Well I don't have a fuse #69, so just started pulling all the 60s out and sure as shit, #67, 20amp fuse is blown. Replaced it, cleared codes again, and seems good to go now. A thousand times thank you sir, not sure how long it would have taken me to figure out a blown fuse could cause a CEL. I'm betting the sensor was still bad and caused the fuse to blow, several times I let the brake fluid run over while switching to the track pads. So to summarize, if you have 27E4 & replaced your sensor and still have codes, check your fuses,l either #67 or #69. Hell, maybe check the fuse first, maybe it doesn't need a sensor at all. |
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07-02-2020, 05:38 PM | #37 |
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Excellent resolution. I’m glad you found my post and it hopefully saved you a little headache 😁
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07-27-2020, 03:13 PM | #38 |
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Update: Still popping #67 fuse, not sure why. Next step is to study the electrical diagrams and see what else in the system could be causing it.
That said, replacing the fuse does make the car run fine without having to touch the sensor again. |
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07-27-2020, 04:17 PM | #39 |
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For me it was the original vacuum pump that had failed, not the sensor. Convinced of it!
I picked up a used one from ECS. It’s in a box still after it didn’t solve the issue (because I never replaced the fuse) and I have a new pump in now (which did nothing until I got the fuse diagram idea). |
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08-02-2020, 05:19 PM | #40 |
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It's a 15 $ fix! Got the sensor out very easily. Remove the torxscrews on the sensor, unbolt the ABS and make some space. Pull the sensorcable and you got it in your hands!
I checked the numbers on my pressure sensor and found a MAP sensor from a Z4 with the exact same number on eBay for 15$ (besides the production date). Immediately I heard that the pump stoped working overtime. Have been driving it for 3 days now, no codes, no limpmode |
08-22-2020, 10:21 PM | #41 |
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Just to add to what everyone has posted, I was having same issues for a week. Everytime I got near 4k RPM car would go right into limp mode. I had my brake fluid flushed by BMW several months ago and then I did my own rear brake pads couple weeks ago. She ran fine just until this week and all of sudden car is handicapped.
I have the Turner Stage 2 tune so I was able to see the consistent code of 27E4 coming up each time.. Noticed the constant buzzing noise coming from the brake reservoir area that was never there before and then noticed the brake fluid well above the MAX fill line.. Seems like same problem as everyone else, the brake vacuum sensor. I noticed that it is the same sensor as the MAP sensor as previously mentioned. I came across this on Amazon [https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 - Car MAP Sensor Vehicle Intake Manifold Air Pressure Sensor for 128i 325i 328i 330i E90 E91 E92 E82] $17.99 - 1 day Prime shipping. Just installed and worked like a charm. such a pain to install.. I did lose 1 of the torxscrews that was holding the sensor down... Anyone else lose 1? How deep is that hole?
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2007 E90 AW 335i -ZSP/6MT- Delivered: 4/2007 SOLD: 3/2012 ETS IC - Stett CAI - AE Exhaust - UUC SS - Morr VS8 - Mtech kit IG: krapm3 2010 E90 SSII M3 -ZPP/ZTT/6MT-Found: 5/2012 Turner Testpipes/Stage 2 - Corsa Exhaust - Bilstein B16 - BBS LM - BBK - AutoSolutions SSK Last edited by krapnoj; 08-23-2020 at 01:30 AM.. |
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09-03-2020, 06:20 AM | #42 |
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Hi everyone. My E92 M3 has same problem. It is last the version from 2013 and only 73T km.
I drive it to BMW and they find 27E4 code. Replaced the vacuum pump,checked the complete pipeline, checked the fuse, eventually,the problem is from the senser. Just got call from BMW my car has been repaired. |
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11-06-2020, 12:31 PM | #43 | |
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the swap took a bit of finessing with some magnetic tools and a solid headlamp but its totally possible. price of sensor $25. |
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11-06-2020, 05:26 PM | #44 | |
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