Crankcase ventilation + trans shadow code

kianf22 · 12-30-2020, 08:42 PM

Another day, another code. Had a gut feeling to check for codes (it's been far too long without a problem lol) and this is what I see. Neither of the codes are causing a CEL but show up on MHD code reader.

Code 20E120 - Car has Agency Power intake.. I understand this may be causing the crankcase code. Where should I start in finding and solving the issue?

421892 unknown - As for the transmission shadow code, I'm currently running XHP stage 3. When I checked for codes with xHP, nothing came up.. only shows on MHD. Should I be worried, or is it normal?

Thanks!

Jnat · 01-02-2021, 10:42 AM

I just looked, i have the same shadow code, unless i find out otherwise, i'm not worried about it.

kianf22 · 01-02-2021, 11:35 PM

Quote:

Originally Posted by Jnat

I just looked, i have the same shadow code, unless i find out otherwise, i'm not worried about it.

Feel a bit better hearing that you have it too hahha. Also running XHP Stage 3? I haven't tried uninstalling or reflashing to see if it persists. Hopefully it's nothing but I'll check that as soon as I can.

Jnat · 01-03-2021, 08:34 AM

Quote:

Originally Posted by kianf22

Feel a bit better hearing that you have it too hahha. Also running XHP Stage 3? I haven't tried uninstalling or reflashing to see if it persists. Hopefully it's nothing but I'll check that as soon as I can.

Yes, i'm on stg3 and i have used xhp b4 and had the same thing. I've reflashed and uninstalled for different reasons and the code always comes back. I'm chalking it up to be a tuner code.

kianf22 · 01-05-2021, 03:32 PM

Quote:

Originally Posted by Jnat

Quote:

Originally Posted by kianf22

Feel a bit better hearing that you have it too hahha. Also running XHP Stage 3? I haven't tried uninstalling or reflashing to see if it persists. Hopefully it's nothing but I'll check that as soon as I can.

Yes, i'm on stg3 and i have used xhp b4 and had the same thing. I've reflashed and uninstalled for different reasons and the code always comes back. I'm chalking it up to be a tuner code.

Cool, then all should be good when I go back to stock for service. Thanks!

Hope I can resolve my other code as well by just reinstalling my intake more tightly.

kianf22 · 01-11-2021, 08:59 PM

Update on diagnosing my CCV code: took the intake out and reinstalled it much tighter the second time. Drove around for a little bit and the code didn't pop up right away, will check it periodically to see if it does come back.

When I was doing this, I noticed some oil in the intake piping. Should I be worried at all? Should I get a catch can or is this normal? I know BMS has one but it's designed to work with their intake so not sure where I'd mount it because I have the AP intake..

Feedback appreciated!

spike760 · 07-16-2021, 07:56 AM

Hey do you have any update on this? I threw engine code 20E120 but unlike you I have the stock airbox. I took apart the pcv hose and checked for cracking but everything looked ok. I did also have some oil towards the bottom of the intake by where it looks like your hand is in the 3rd picture.

Running BM3 Stage 2 E30 and XHP Stage 3. Ran threw a whole tank of E30 and this didn't happen till refilling under normal driving conditions.

JD11937 · 07-16-2021, 02:55 PM

Quote:

Originally Posted by spike760

Hey do you have any update on this? I threw engine code 20E120 but unlike you I have the stock airbox. I took apart the pcv hose and checked for cracking but everything looked ok. I did also have some oil towards the bottom of the intake by where it looks like your hand is in the 3rd picture.

Running BM3 Stage 2 E30 and XHP Stage 3. Ran threw a whole tank of E30 and this didn't happen till refilling under normal driving conditions.

Crankcase breather hose vents into the bottom of the intake so you can get oil in there. Not clear how much is too much but a catch can will help this.

kennungesser · 08-22-2021, 08:40 AM

I have no tune and car is completely stock. I may someday, but happy to have no worries
when going to the dealer, lol. Along with a OCC, could this help you guys at all? Vargas B58 One Way Crankcase Breather - F Chassis B58 3.0L. I may do the OCC along with it, as anything the "helps" the car last longer is a win to me.

12-30-2020, 08:42 PM	#1
kianf22 First Lieutenant 64 Rep 348 Posts Drives: 2020 BMW M240i Join Date: Jul 2019 Location: Southern California iTrader: (1)	Another day, another code. Had a gut feeling to check for codes (it's been far too long without a problem lol) and this is what I see. Neither of the codes are causing a CEL but show up on MHD code reader. Code 20E120 - Car has Agency Power intake.. I understand this may be causing the crankcase code. Where should I start in finding and solving the issue? 421892 unknown - As for the transmission shadow code, I'm currently running XHP stage 3. When I checked for codes with xHP, nothing came up.. only shows on MHD. Should I be worried, or is it normal? Thanks! Attached Images __________________ Pure800 - DS2 HPFP - Nostrum S1 - ER Catless DP - Remus Non-Resonated Catback - BM3 Flex Fuel Kit - Ross V1 VTA PCV - Custom Tunes on MHD/BM3 - xHP Stage 3 - TCKline SA/DA Coils - Apex ARC8s - Vicrez Carbon Fiber CSL Trunk - ALP Laser System - Escort Max 360c with Blendmount + more... \| IG: kianf22 \|
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01-02-2021, 10:42 AM	#2
Jnat DisplacementReplacement 394 Rep 1,092 Posts Drives: 2020 X3M Join Date: Sep 2012 Location: Jersey Shore iTrader: (0)	I just looked, i have the same shadow code, unless i find out otherwise, i'm not worried about it. __________________ 2020 X3M /// MHD Tune Prior Bimmers 2017 240XI Hybrid / FBO / MHD E40 2015 235XI FBO / MHD E30 2009 335XI FBO / COBB / E30
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01-11-2021, 08:59 PM	#6
kianf22 First Lieutenant 64 Rep 348 Posts Drives: 2020 BMW M240i Join Date: Jul 2019 Location: Southern California iTrader: (1)	Update on diagnosing my CCV code: took the intake out and reinstalled it much tighter the second time. Drove around for a little bit and the code didn't pop up right away, will check it periodically to see if it does come back. When I was doing this, I noticed some oil in the intake piping. Should I be worried at all? Should I get a catch can or is this normal? I know BMS has one but it's designed to work with their intake so not sure where I'd mount it because I have the AP intake.. Feedback appreciated! Attached Images __________________ Pure800 - DS2 HPFP - Nostrum S1 - ER Catless DP - Remus Non-Resonated Catback - BM3 Flex Fuel Kit - Ross V1 VTA PCV - Custom Tunes on MHD/BM3 - xHP Stage 3 - TCKline SA/DA Coils - Apex ARC8s - Vicrez Carbon Fiber CSL Trunk - ALP Laser System - Escort Max 360c with Blendmount + more... \| IG: kianf22 \|
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07-16-2021, 07:56 AM	#7
spike760 New Member 0 Rep 6 Posts Drives: 2017 BMW M240i xDrive Join Date: Feb 2021 Location: MN iTrader: (0)	Hey do you have any update on this? I threw engine code 20E120 but unlike you I have the stock airbox. I took apart the pcv hose and checked for cracking but everything looked ok. I did also have some oil towards the bottom of the intake by where it looks like your hand is in the 3rd picture. Running BM3 Stage 2 E30 and XHP Stage 3. Ran threw a whole tank of E30 and this didn't happen till refilling under normal driving conditions.
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08-22-2021, 08:40 AM	#9
kennungesser New Member 6 Rep 16 Posts Drives: 2017 M240i Xdrive Join Date: May 2020 Location: OH iTrader: (0)	I have no tune and car is completely stock. I may someday, but happy to have no worries when going to the dealer, lol. Along with a OCC, could this help you guys at all? Vargas B58 One Way Crankcase Breather - F Chassis B58 3.0L. I may do the OCC along with it, as anything the "helps" the car last longer is a win to me.
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