Hey guys,
The engine warning light came on the other day, I took it to a garage and got the fault code read, it came back as p0030 which was that the oxygen sensor bank 1 sensor 1 was faulty. Anyway i've changed the oxygen sensor (I brought a reputable one (NGK) as the price of a Ford part was over £160) and took it back to the garage and got the memory cleared.
However the engine warning light is still on and reporting the same fault?
Anybody have any ideas as to what i can do next?
Thanks in advance

 

so the upper hego was replaced yeah.next step is to check the wiring to it.make sure theres no shorts or open circuits