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BMW M5 F90 (2018+) General Forums Engine, Exhaust, Drivetrain, Tuning Modifications    Diagnostic Mode / JB4 Drive Train Codes

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      02-08-2020, 12:22 PM   #1
JBA87
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Diagnostic Mode / JB4 Drive Train Codes

I just purchased JB4 and installed EWG connectors. Running Map 2 on 2019 M5 Comp. After driving, I obtained drivetrain malfunction alert. JB4 shows the following codes:

2020-02-08 12_50_22:
120700 No Description Found
000000 No Description Found

2020-02-08 13_01_58:
12071A No Description Found
021304 No Description Found
001A01 No Description Found

2020-02-08 13_02_11:
12071A No Description Found
021304 No Description Found
1F2112 No Description Found

2020-02-08 13_20_59:
12071A No Description Found
021304 No Description Found
1F2112 No Description Found


Terry suggesting I install the firmware update. I believe I did the correctly

Codes still present

He says I need to delete in diagnostic mode

Two questions:

Can Anybody provide color on the above codes
How do I enter diagnostic mode to delete


Any help much appreciated

Also, fuel economy seems horrible after install
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      02-08-2020, 03:01 PM   #2
Fuel-It!
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Diagnostic mode means you press the start/stop button 3 times with the foot off the brake. That is the only mode the car will allow you to delete codes with.

Mileage isn't going to be effected even if installed wrong so likely you're just racing around more testing stuff.
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