JB4tech.com - International Turbo Tuning Discussion
Riffyb Riffyb is offline
New Member
Posts: 3
Join Date: May 2019
Car: M550 19
Default 19 M550 JB4 Codes and Drivetrain malfunction help - 05-11-2020, 07:41 AM

Hi All.

Recently Had my JB4 installed ( at dealer )

It was running fine for about a week, then one afternoon I got a CEL when starting the car. I ran the Mobile App to find the code. Nothing... I had no issues with car at all.

A few days later, I got a drivetrain malfunction and went into limp mode. After running the app again to check for codes i got a code 120908.I was in map 3 driving spirited and when I let of the gas, the malfunction popped up. I parked the car and let it sit overnight. Upon restarting, The Drivetrain malfunction was still there. The car was driving just fine. After a few days the CEL disappeared but the drivetrain malfunction was still there.

After reaching out to BMS I did a few logs and was told to update the firmware which I did.

Immediately after the firmware update I recieved a CEL again and several new codes.

Any guidance would be appreciated. I reached out to BMS and still waiting for a response.

thank you
Attached Images

Last edited by Riffyb; 05-11-2020 at 08:08 AM.. Reason: wrong Code
Reply With Quote
Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
Posts: 34,330
Join Date: Jan 2008
Default 05-11-2020, 07:42 PM

Have a JB4 log so we can see the details?

Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote
Riffyb Riffyb is offline
New Member
Posts: 3
Join Date: May 2019
Car: M550 19
Default 05-12-2020, 04:43 AM

Yes please see attached
Attached Files
File Type: csv 20200506_1710_runs(1).csv (9.3 KB, 208 views)
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2022, JB4tech.com