b58 codes

badass335 · 05-05-2023, 11:48 AM

SO have had an issue with the car lately. I'm running MHD stage 2+, with CTS high flow cats, BMW intake AND the TU1 pump. I had the FTP intake pipe but removed as i was having codes.

I cant seem to get rid of these codes and the car has been put to stock almost.
118001 - mixture control: fuel-air mixture too lean
118002 - mixture control: fuel-air mixture too rich
20E120 - crankcase ventilation, vent hose: not connected/ faulty

i have replaced the entire intake system to stock, replace the crankcase hose as per Kern417 videos. replaced the primary O2 sensor, MAF sensor and still having issues. Gave it to BMW and they are going through it and coming up blank too. The car is running stock (MHD completely removed) currently, with stock intakes. the downpipe is still a high flow cat but that should not be causing these issues. (have the cat code but we expect that)

what else can we try? not much else left.

badass335 · 05-05-2023, 02:08 PM

So update. Talked to my dealer and they are replacing the valve cover as the pcv is built onto it as I am still getting the crankcase error.

Let's see what happens.

lanlilan · 05-09-2023, 12:00 PM

Quote:

Originally Posted by badass335

...

Let's see what happens.

Did replacing the valve cover fix the issue? How much did the dealer charge for it?

yupetc · 05-13-2023, 07:37 AM

Also interested to see what's the final diagnosis and fix. I have similar setup, just VRSF hi-flow cat, everything else being the same. Though I have no codes so far, I'd be expecting some sort of PCV issue as the car's getting close to 60k right now and having owned several later gen BMW's I come to mental readiness with the built-in PCV's if they go wrong. Hopefully there's nothing else besides the valvecover. Subb'd for knowledge.

badass335 · 05-23-2023, 02:40 PM

So update. Valve cover DID NOT resolve the issue. Lean codes, mixture codes. Dealer is seeing what they can try next. So much has been replaced.

badass335 · 05-24-2023, 12:11 PM

Dealer thinking they will try replacing the fuel pump. I had replaced the fuel pump with the tu1 unit. Maybe that's faulty, not sure. they will let me know this week.

badass335 · 05-24-2023, 12:13 PM

Quote:

Originally Posted by lanlilan

Did replacing the valve cover fix the issue? How much did the dealer charge for it?

dealer did this under warranty.

Tpriest7893 · 05-25-2023, 07:42 PM

My n55 pcv valve broke at 112k miles, thing was a pain

badass335 · 05-26-2023, 03:27 PM

Newest update. Dealer replacing hpfp. Let's see what happens next.

badass335 · 06-02-2023, 01:11 PM

HPFP was replaced and so far, no more codes. Just a CAT code but i have high flow cats so expected. Running car totally stock for now. The Head tech has been driving the car to ensure no codes come up. Dealer service team has been awesome for me to troubleshoot it all. If all stays clear, i get it back next week. I'll run it stock for maybe another week before i apply MHD again.

yupetc · 06-02-2023, 03:47 PM

Quote:

Originally Posted by badass335

HPFP was replaced and so far, no more codes. Just a CAT code but i have high flow cats so expected. Running car totally stock for now. The Head tech has been driving the car to ensure no codes come up. Dealer service team has been awesome for me to troubleshoot it all. If all stays clear, i get it back next week. I'll run it stock for maybe another week before i apply MHD again.

That's great news! Let's see what MHD does with the new pump. Sub'd again.

RonronEG · 06-02-2023, 04:16 PM

Subbing in for updates

PaPaDrew G30 · 06-06-2023, 02:50 PM

Quote:

Originally Posted by badass335

HPFP was replaced and so far, no more codes. Just a CAT code but i have high flow cats so expected. Running car totally stock for now. The Head tech has been driving the car to ensure no codes come up. Dealer service team has been awesome for me to troubleshoot it all. If all stays clear, i get it back next week. I'll run it stock for maybe another week before i apply MHD again.

So, to your OG post, you were having the codes on the TU Pump, with the Stage 2+ tune? Then changed out the TU pump with a new TU pump, and no errors?

PunkMan215 · 06-22-2023, 02:18 PM

Quote:

Originally Posted by badass335

HPFP was replaced and so far, no more codes. Just a CAT code but i have high flow cats so expected. Running car totally stock for now. The Head tech has been driving the car to ensure no codes come up. Dealer service team has been awesome for me to troubleshoot it all. If all stays clear, i get it back next week. I'll run it stock for maybe another week before i apply MHD again.

Hey any new updates? Running stage 2 again?

_ksarao · 09-29-2023, 03:51 PM

I’m having same issue.
I think I need my HPFP replaced.

Tpriest7893 · 09-30-2023, 11:52 AM

The dealer did all that work under warranty with MHD? Did they know you were tuned?

05-05-2023, 11:48 AM	#1
badass335 Lieutenant Colonel 109 Rep 1,948 Posts Drives: 2017 540i Xdrive Join Date: Jul 2007 Location: Surrey, BC iTrader: (10)	b58 codes SO have had an issue with the car lately. I'm running MHD stage 2+, with CTS high flow cats, BMW intake AND the TU1 pump. I had the FTP intake pipe but removed as i was having codes. I cant seem to get rid of these codes and the car has been put to stock almost. 118001 - mixture control: fuel-air mixture too lean 118002 - mixture control: fuel-air mixture too rich 20E120 - crankcase ventilation, vent hose: not connected/ faulty i have replaced the entire intake system to stock, replace the crankcase hose as per Kern417 videos. replaced the primary O2 sensor, MAF sensor and still having issues. Gave it to BMW and they are going through it and coming up blank too. The car is running stock (MHD completely removed) currently, with stock intakes. the downpipe is still a high flow cat but that should not be causing these issues. (have the cat code but we expect that) what else can we try? not much else left.
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05-05-2023, 02:08 PM	#2
badass335 Lieutenant Colonel 109 Rep 1,948 Posts Drives: 2017 540i Xdrive Join Date: Jul 2007 Location: Surrey, BC iTrader: (10)	So update. Talked to my dealer and they are replacing the valve cover as the pcv is built onto it as I am still getting the crankcase error. Let's see what happens.
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05-13-2023, 07:37 AM	#4
yupetc Captain 390 Rep 661 Posts Drives: 2015 X535i Join Date: Feb 2013 Location: Houston, TX iTrader: (0)	Also interested to see what's the final diagnosis and fix. I have similar setup, just VRSF hi-flow cat, everything else being the same. Though I have no codes so far, I'd be expecting some sort of PCV issue as the car's getting close to 60k right now and having owned several later gen BMW's I come to mental readiness with the built-in PCV's if they go wrong. Hopefully there's nothing else besides the valvecover. Subb'd for knowledge. __________________ 2015 X535i - CP Piston, Manley Rod, ACL/King bearings, MILVs VRSF full charge Pipe, Wagner FMIC, Hybrid Turbo, MHD2+ VRSF DP, UR Front/Rear Sway Bars, Eibach springs, Bilstein B6 2015 MINI COOPER - Mahle Pistons, Max Rods, BMS intake, CTS charge pipe, Wagner Intercooler, ByteTronik Tune, VRSF DP 2017 540i - MHD2+, VRSF DP, TU Pump
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05-23-2023, 02:40 PM	#5
badass335 Lieutenant Colonel 109 Rep 1,948 Posts Drives: 2017 540i Xdrive Join Date: Jul 2007 Location: Surrey, BC iTrader: (10)	So update. Valve cover DID NOT resolve the issue. Lean codes, mixture codes. Dealer is seeing what they can try next. So much has been replaced.
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05-24-2023, 12:11 PM	#6
badass335 Lieutenant Colonel 109 Rep 1,948 Posts Drives: 2017 540i Xdrive Join Date: Jul 2007 Location: Surrey, BC iTrader: (10)	Dealer thinking they will try replacing the fuel pump. I had replaced the fuel pump with the tu1 unit. Maybe that's faulty, not sure. they will let me know this week.
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05-25-2023, 07:42 PM	#8
Tpriest7893 Captain 217 Rep 821 Posts Drives: Bmw 335i f30 N55 ( sold) Join Date: Nov 2017 Location: Venice Florida iTrader: (0) Garage List [0.00] 2012 bmw 335 [0.00] 02 2002 m3 Vert [0.00]	My n55 pcv valve broke at 112k miles, thing was a pain __________________ 2012 bmw 335i sedan VRSF catless DP VRSF 5? HD IC Stock intake(had open before and was sick of noise) BMS CP 550i 351m rims with 275/245 set up. No tune as of yet.
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05-26-2023, 03:27 PM	#9
badass335 Lieutenant Colonel 109 Rep 1,948 Posts Drives: 2017 540i Xdrive Join Date: Jul 2007 Location: Surrey, BC iTrader: (10)	Newest update. Dealer replacing hpfp. Let's see what happens next.
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06-02-2023, 01:11 PM	#10
badass335 Lieutenant Colonel 109 Rep 1,948 Posts Drives: 2017 540i Xdrive Join Date: Jul 2007 Location: Surrey, BC iTrader: (10)	HPFP was replaced and so far, no more codes. Just a CAT code but i have high flow cats so expected. Running car totally stock for now. The Head tech has been driving the car to ensure no codes come up. Dealer service team has been awesome for me to troubleshoot it all. If all stays clear, i get it back next week. I'll run it stock for maybe another week before i apply MHD again.
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06-02-2023, 04:16 PM	#12
RonronEG Lieutenant 336 Rep 471 Posts Drives: BMW 540i Join Date: Dec 2020 Location: Northern California iTrader: (0)	Subbing in for updates
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09-29-2023, 03:51 PM	#15
_ksarao New Member 0 Rep 18 Posts Drives: 2021 BMW 540i Join Date: Sep 2022 Location: California iTrader: (0)	I’m having same issue. I think I need my HPFP replaced. Attached Images
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09-30-2023, 11:52 AM	#16
Tpriest7893 Captain 217 Rep 821 Posts Drives: Bmw 335i f30 N55 ( sold) Join Date: Nov 2017 Location: Venice Florida iTrader: (0) Garage List [0.00] 2012 bmw 335 [0.00] 02 2002 m3 Vert [0.00]	The dealer did all that work under warranty with MHD? Did they know you were tuned? __________________ 2012 bmw 335i sedan VRSF catless DP VRSF 5? HD IC Stock intake(had open before and was sick of noise) BMS CP 550i 351m rims with 275/245 set up. No tune as of yet.
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