hi all can anyone help my son keeps getting this code U0001 high speed CAN communication bus and his engine go`s into limpmode with e m light on this seems to happen when he is on the motorway with a lot of power needed but when he stops and turns off it clears and leaves no code found  it is a 1.6 engine thanks for any help barry

1 hour ago, basilbrush909 said:

hi all can anyone help my son keeps getting this code U0001 high speed CAN communication bus and his engine go`s into limpmode with e m light on this seems to happen when he is on the motorway with a lot of power needed but when he stops and turns off it clears and leaves no code found  it is a 1.6 engine thanks for any help barry

Have a look here -> http://www.fordownersclub.com/forums/topic/63440-focus-mk2-14-u0001/

 

 

On 8/12/2017 at 6:18 PM, basilbrush909 said:

hi all can anyone help my son keeps getting this code U0001 high speed CAN communication bus and his engine go`s into limpmode with e m light on this seems to happen when he is on the motorway with a lot of power needed but when he stops and turns off it clears and leaves no code found  it is a 1.6 engine thanks for any help barry iscribble

this problem is not too complicated but i am also having a headache with the same case.

Just solved a U0001/Non start issue on a friends Mk4 Mondeo. 

Couldn't read multiple modules with IDS or Forscan, dash lit up like a christmas tree. 

Found one of the highspeed CAN wires had 12v being put down it which was causing the problems....CAN should be maximum 5v.

The culprit? Electric power steering pump. 

The car had been to multiple garages including a ford dealership, various modules sent away for testing. Took me 6 hours with a multimeter to determine that unplugging the power steering pump would allow all other modules to work correctly and the car started.