FORScan forum

Hi
I was wondering if any experts might help me solve this mysterium of a Kuga.
It is constantly in limp mode, starts and run fine, but no boost.

I had problems with the abs module, this was replaced and it seems like everything is fine on as builts and stuff like that.

Here is my fault codes:
===ABS DTC C1093-A0===
Code: C1093 - ESP Lamp Switch Defective
===EPS DTC C1956-30===
Code: C1956 - Steering Angle Sensor Circuit Failure
===EPS DTC U1900-20===
Code: U1900 - Missing Message for Engine Speed
===EPS DTC U261B-20===
Code: U261B - Improper Program Termination
===IC DTC U1900-20===
Code: U1900 - CAN communication bus fault

Also this is very relevant:
Code: P0299 - Turbocharger/Supercharger Underboost
- Signal is Above maximum threshold

The turbo is a vacuum assisted with a electric sensor.
The diaphragm was broken and i replaced this, and measured the rod length of the old one and just adjusted the new one to the same length. However i get a weird reading on the VGTDC% in forscan, it starts on 199% on idle and decreased to about 120-130% with throttle.

Boost is 95kpa always. If i put a mityvac on the actuator the boost increases so it is not a mechanical issue. I also checked the vacuum input on the solenoid valve, and also replaced the valve but the ECU wont send a signal to adjust the actuator, or there is an issue with the actuator?

It seems like there’s an issue with software or hardware compatibility. You should check all files and hardware are correct.
It’s unlikely for that many components to suddenly stop working for no reason and for that many signals to get messed up.
Unless of course someone damaged wiring whilst installing the new abs unit.

Check software and hardware versions then do a thorough visual inspection within the area of repair.