Kia Sportage Diesel Common Rail turns on and turns off

Hello colleagues I have a truck in my Kia Sportage workshop model 2009 diesel, it has a problem that turns on and turns off the scanie and the P1181 code comes out but it tells me that air inlet solenoid is missing dough but I do not know that it can be the other is that I looked at the code on the internet and vote that high pressure in the rail and I do not know what to do the truck tank in a pump and after there is annoying and it started underwater bamba that is in the tank sounded and the cleaned the prefilter changed the filter that is not original and the truck went well and the 100 km began to go out only when it went down but in climbing nothing
happened to the destination they turned it off and when they went to turn it on and last 10 seconds and it turns off and shows the code P1181

Dear, you could tell me if your problem had a solution and how it was, since I have an inconvenience similar to yours.
Thanks for the answer.
Greetings