Need help 120408 code Drive train malfunction

Mr_M// · 04-21-2022, 09:43 AM

I would appreciate any help and advice

I have the wastegate stock open and the Drive train malfunction, I talk to a mechanic and he thinks my Westgate is not working and need to be replaced. ( he looked at the wastegate while I was Starting the car and it didn’t move to Adjust itself, plus we’re trying to adjuste it with his machineThat was connected to my car electronically and It didn’t do anything.
I’m not sure that’s the case, the car was working fine last year before I stored it for winter.
I installed bm3 flex fuel and that triggered the whole miss, all dash lights to go on. , I removed the connection and all light back to normal Except the Drivetrain malfunction Cade 120408 and 123422 code.
I took the car for to drive and can hear the boost is getting released. (From the passenger side).
What I changed before This :
1- Dorch stage 2 fuel pump ( last December ,I only started the car to make sure it’s working and there was no lights).
2- I flash the car stage 2+ E30 map
3- I added e85 on the tank it’s E50 mix now.

The car is FBO plus pure turbo stage 2.

js0228 · 05-04-2022, 09:13 AM

Have you figured out what the issue was with your car? My og M2 is having the same fault code 120408 & 123516, and these time to time 123422, 123702, 213601. I thought it was the WG actuator issue so I ordred a new one and still had the same codes even with the new actuator. Also, when I start my car, both of the actuator didn't move at all.

Mr_M// · 05-04-2022, 12:53 PM

Quote:

Originally Posted by js0228

Have you figured out what the issue was with your car? My og M2 is having the same fault code 120408 & 123516, and these time to time 123422, 123702, 213601. I thought it was the WG actuator issue so I ordred a new one and still had the same codes even with the new actuator. Also, when I start my car, both of the actuator didn't move at all.

Yes it’s all fixed, I didn’t need an actuator ( Wastegate). It was fuel related, and I flashed my car back to stage 2+E30 from multimap stage 2+ e30.

What did you do to your car lately?

js0228 · 05-05-2022, 08:33 AM

I didn't do any performance modification recently. Everything was done for sometime now. I don't know why it just started giving me this error message and my car goes into limp mode. It still runs and drives, just no boost. Mines fbo with b.b. 3.4 turbo kit running full e85. Been driving like this for 6 months? I wonder if I change my tuning it'll be fine too..... So, all you did was change the tune and lowered e content?

js0228 · 05-05-2022, 09:18 AM

One more thing, after you changed your tune file, did your car come back to normal right away? Or did you have to drive for awhile/couple days?

Mr_M// · 05-05-2022, 10:13 AM

Quote:

Originally Posted by js0228

I didn't do any performance modification recently. Everything was done for sometime now. I don't know why it just started giving me this error message and my car goes into limp mode. It still runs and drives, just no boost. Mines fbo with b.b. 3.4 turbo kit running full e85. Been driving like this for 6 months? I wonder if I change my tuning it'll be fine too..... So, all you did was change the tune and lowered e content?

In my case , it was the Flex fuel kit I completely removed it and clear the codes then flashed it.
I also removed the Tmap sensor back to stock one but returned it after.
I bought the EWG as well but luckily didn’t install it

.

Mr_M// · 05-05-2022, 10:41 AM

I was told that EGW It’s supposed to move and I just had sal every time you put the ignition on or start the car, now I don’t believe that’s the case.
I also did Move the EWG Valve by hand to change Position from open to close. Just so the computer demands a change, not sure if that helped but I was welling to do anything different.

Mr_M// · 05-05-2022, 10:47 AM

Quote:

Originally Posted by js0228

Have you figured out what the issue was with your car? My og M2 is having the same fault code 120408 & 123516, and these time to time 123422, 123702, 213601. I thought it was the WG actuator issue so I ordred a new one and still had the same codes even with the new actuator. Also, when I start my car, both of the actuator didn't move at all.

you’re having different codes than I did.
What I understood if anything is not right the car will order the EWG to stay open for safety reasons.
Good luck

js0228 · 05-05-2022, 12:32 PM

Gotya, thank you for the replies I'll try to check it out one more time before I take it in to the service.

04-21-2022, 09:43 AM	#1
Mr_M// Second Lieutenant 124 Rep 261 Posts Drives: 2017 M2/M3 Join Date: Jan 2020 Location: Ontario iTrader: (0)	Need help 120408 code Drive train malfunction I would appreciate any help and advice I have the wastegate stock open and the Drive train malfunction, I talk to a mechanic and he thinks my Westgate is not working and need to be replaced. ( he looked at the wastegate while I was Starting the car and it didn’t move to Adjust itself, plus we’re trying to adjuste it with his machineThat was connected to my car electronically and It didn’t do anything. I’m not sure that’s the case, the car was working fine last year before I stored it for winter. I installed bm3 flex fuel and that triggered the whole miss, all dash lights to go on. , I removed the connection and all light back to normal Except the Drivetrain malfunction Cade 120408 and 123422 code. I took the car for to drive and can hear the boost is getting released. (From the passenger side). What I changed before This : 1- Dorch stage 2 fuel pump ( last December ,I only started the car to make sure it’s working and there was no lights). 2- I flash the car stage 2+ E30 map 3- I added e85 on the tank it’s E50 mix now. The car is FBO plus pure turbo stage 2.
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05-04-2022, 09:13 AM	#2
js0228 New Member 3 Rep 22 Posts Drives: M235i Xdrive and M2 Join Date: Mar 2019 Location: Hanover, Maryland iTrader: (0)	Have you figured out what the issue was with your car? My og M2 is having the same fault code 120408 & 123516, and these time to time 123422, 123702, 213601. I thought it was the WG actuator issue so I ordred a new one and still had the same codes even with the new actuator. Also, when I start my car, both of the actuator didn't move at all.
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05-05-2022, 08:33 AM	#4
js0228 New Member 3 Rep 22 Posts Drives: M235i Xdrive and M2 Join Date: Mar 2019 Location: Hanover, Maryland iTrader: (0)	I didn't do any performance modification recently. Everything was done for sometime now. I don't know why it just started giving me this error message and my car goes into limp mode. It still runs and drives, just no boost. Mines fbo with b.b. 3.4 turbo kit running full e85. Been driving like this for 6 months? I wonder if I change my tuning it'll be fine too..... So, all you did was change the tune and lowered e content?
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05-05-2022, 09:18 AM	#5
js0228 New Member 3 Rep 22 Posts Drives: M235i Xdrive and M2 Join Date: Mar 2019 Location: Hanover, Maryland iTrader: (0)	One more thing, after you changed your tune file, did your car come back to normal right away? Or did you have to drive for awhile/couple days?
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05-05-2022, 10:41 AM	#7
Mr_M// Second Lieutenant 124 Rep 261 Posts Drives: 2017 M2/M3 Join Date: Jan 2020 Location: Ontario iTrader: (0)	I was told that EGW It’s supposed to move and I just had sal every time you put the ignition on or start the car, now I don’t believe that’s the case. I also did Move the EWG Valve by hand to change Position from open to close. Just so the computer demands a change, not sure if that helped but I was welling to do anything different.
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05-05-2022, 12:32 PM	#9
js0228 New Member 3 Rep 22 Posts Drives: M235i Xdrive and M2 Join Date: Mar 2019 Location: Hanover, Maryland iTrader: (0)	Gotya, thank you for the replies I'll try to check it out one more time before I take it in to the service.
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