Hi again, Just coming back to say the code hasn’t returned and a satisfied customer. It's all a bit of a mystery but the only thing that may have had a bearing on the job was I had left a couple of pins down the back of the wires when I was pinning out back to the ECU these have also since been removed, but it would take 3-4 days for the code to reappear. Many thanks for all your interest and help on this one.
John Kennard.