Hello
I have a superduke and on the way home the FI light started flashing. Its blink code 09 - "intake manifold air pressure for sensor rear cylinder". So, I've googled it and no info. What the hell is that?

It sounds expensive. Bike seems ok, though a little grouchy/surging etc. I'm keen to avoid blowing it up if at all possible.

Any ideas or help much appreciated.