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grh372 grh372 is offline
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Join Date: May 2018
Car: 2014 mini cooper s
Default fault codes and limp mode - 05-06-2018, 05:35 PM

I have used the jb4 for almost a year and love it. last week right after starting the car the "drivetrain malfunction, maximum drivetrain output not available" message would appear. i turned off the car and restarted and it was normal.
week later same message now with the check engine light, scanned and found codes
121201 boost pressure sensor, plausibility, caster: pressure too high.
121532 boost pressure ambient pressure comparison boost pressure too high
120408 boost pressure control: shutdown due to reaction

anything i should be looking for? i took the unit out and haven't had an issues since, I'm really missing the power of the jb4 though
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Cioolio Cioolio is offline
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Default 06-08-2018, 07:43 AM

I have the same problem with the same errors. Anyone know the problem?
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Payam @ BMS's Avatar
Payam @ BMS Payam @ BMS is offline
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Car: e90 335i
Default 06-12-2018, 11:01 AM

When does it happen? After a pull?

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akgambino akgambino is offline
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Car: 2013 F30 335i xDrive
Default 05-20-2019, 07:53 PM

Did anyone ever find out the cause for code 121201 boost sensor plausibility?
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