As above I've replaced the lamba with a universal new one , used a spacer and filled it with wife wool still showing the same code and putting it into limp mode starting to really annoy me now. I need this fixed before I sell/swap it I won't sell with this problem for new buyer

Any help please thanks

The fault is for the heater circuit of the sensor. Check for power down one of the black wires, and earth down the other black.

What make is the new sensor?