David Ronk
New member
We have a 2015 F350 6.7 Powerstroke that keeps coding P1552. The truck runs fine and there is no smoke, we have replaced the injector, tested the wiring harness and bypassed it and finally replaced the PCM. we still get the same code. if we delete the code and turn the truck off, the code will return when we restart it. Any help would be greatly appreciated.