Hi all,

I recently picked up a 2014 F56 Cooper S and bought a JB4 from someone on the marketplace.

I love map 1 on the JB4, but whenever I drive hard for a little while in map 1, it inevitably will throw a CEL the next time I'm in the car.

After reading the error codes it always seems to be related to the following:
121201 TMAP Signal Active with engine off

Every other time it will also throw:
121532 boost pressure sensor, plausibility: Pressure upstream from throttle at motor stand
120408 Reduced power mode
The reduced power mode also throws a warning on my central instrument panel that says drivetrain malfunction.

Has anyone experienced this before? The JB4 is the only mod I have so I'm sure it's something attributed to that. I tried to research this and did notice was that there's a difference between JB4 units that are built for production models after 12/14 whereas mine was built around 10/14. Is there a way to check which production series my JB4 was meant for?
I tried to update the firmware and app software but it still doesn't seem to solve the problem.

Any help would be appreciated, thanks!

 

Update: I had a new code thrown that caused me to be in limp mode for 2 weeks now even after taking the JB4 off.
Code 123601 Wastegate short circuit.

 

I’d take that unit out, those are some pretty big codes you are getting. Is it the right unit for your Mini?

Maybe send it to Burger to check.