i have code p0020 on my 04 f150 5.4l 3v, how do i repair that

Question

my truck runs rough once it warms up, making a knocking noise at times. It has a code p0020. I've replaced the VCT's , the camshaft sensors, crank sensor, spark plugs. I sure do appreciate any help that anyone has for me.

Answer 1

P0020 Camshaft position "A" actuator circuit Bank

Was both VCT replaced ? that required, If both VTC have been replaced inspect the front camshaft bearing cap and check for wear, If you accelerate and come to a slow stop and the engine begins to buckle and rough idle somehow you are loosing oil pressure to the VCT,