2006 Isuzu NPR HD, 4HK1 engine. Code P0089. This part fixed my problem. Prior to replacing this valve the truck would run for a few miles and go into limp mode. I’d have to shut it off for at least 10 seconds and then restart to keep moving. Eventually it would happen again. The dealership I took it to advised I needed a new pump and new injectors which they estimated at €1080. When I checked the same dealership the suction control valve was €316. It’s only been a few days since I changed out the suction control valve and I will update again if there are any issues.
