Please HELP.. Errorcode limp mode

I have studdering acceleration around 3000 rpm in 1-3 gear.
4th n 5th gear, it goes into limp mode if i just remotely press the gass pedal.

This is at 3-4 degrees celcius..

At 8-9 degrees the error is not occuring

Error is: fuel metering valve 1 control difference.

The car is a 1,6 TDI CR
CAYB 90

With a larger turbo and remap and darkside Fmic.

Any help is hugely appreciated

Suggestions are

Injector not closing fast enough
Pressure tube cracked
Wet drowned ECU
Failure in pressure sensor

Come on... not ONE has an input???? :/

Hi, did you sorted that problem?

What error did the diagnostic tool say?