Limp mode problem
 

I have a 2010 F350 king ranch. It has 202,000 miles on it I change the fuel filters every 20,000 miles and the oil every 5,000 miles. It's a stock truck no upgrades. For the last month and a half it goes into limp or safety mode I own my own business gotta have the truck. I can cruise fine at 75 go up a small hill it drops down to 45. The check engine lite comes and goes I hooked it up to a computer and got the P0088 high rail fuel pressure. My truck starts fine every time. I bought this truck brand new haven't had one problem until now. I'm no mechanic but I've had a fuel pump go out on gas motor. I don't think it can be the HRFP. I don't wanna take it to the shop and get screwed. Any help will be greatly appreciated.