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BMW M5 F90 (2018+) General Forums Engine, Exhaust, Drivetrain, Tuning Modifications    CEL / JB4 Maybe?

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      04-19-2020, 10:51 AM   #1
JBA87
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CEL / JB4 Maybe?

I keep throwing this same CEL

Any ideas how to get rid of it ?

Someone told me it's jb4 related due to the connection

Never had this beFore

Just started
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      04-19-2020, 02:48 PM   #2
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Looks like the issue is something on the FlexRay communication not the the sensors itself. The JB4 doesn't attach to any crankcase pressure sensors nor does it read FlexRay. Maybe something out of calibration or miscoded with the DME flash maps?
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      04-19-2020, 02:57 PM   #3
JBA87
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I just loaded DME e30 map

And it's awfully slow


Slower than my stage 2

Maybe it's related ?
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      04-19-2020, 03:12 PM   #4
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You're sort of in uncharted territory with all the flash maps but if something was coded wrong in the map or in the flashing software that might be a possible cause.
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