X15 2250SN fault code 1911

[Kenworth509]

Well that’s what it seems but I’ve checked for air while the engine is cold and at operating temp and it’s a solid stream of fuel with no air present at all.
I will check that out when I get back to it in a weeks time. I have checked the filters and no coolant seems be be present in them either.
Il let you know once get back to it and check it out mate.