Esp light

[calw123]

Afternoon,

I have a tricky error at the moment 2017 stage 1 ecu and tcu mapped s3 8v sportsback.
Whenever I try to boot the car the esp light comes on and I get very reduced power I have scanned the car with obdeleven twice now and found no faults.
The car has 4 fairly recent pilot sport 5s so good tyres.
It has been mapped years and never had this issue before.
Any ideas on what could be causing this issue ?

Thanks
Cal

 

[calw123]

Just a help out my mechanic friend thinks it could be haldex pump related more than likely failed which would be shame as I have had the fluid changed and gauze cleaned twice in 2 years to be super cautious