p0120

So had the limp mode light on for about a month now have checked and cleaned the throttle body and connectors the white junction box and the pedal connectors all to no avail read lots of threads on this issue but all seem to either just end or not be quite the same the car has a juddery...

Doesn't appear to be a definitive answer to these faults, wherever I have searched. Anybody got a workflow I can start to try and get rid of these two faults? (Without just resetting all faults) Any help will be massively appreciated.