I changed the oil today and added 4 qts but the oil did not register on dipstick. Then I remembered the last time I changed the oil the same happened and I added 5 courts for it to register 3/4 full. Now I know I overfilled because the dipstick does not go all the way in. I push but no dice. It only goes to the first rubber O-ring. The dipstick is not bent in any way and the only thing different from normal is I replaced with a Fumoto valve 4 yrs ago. There's no indication of loss of oil pressure. What could be blocking the dipstick from inserting fully? And not sure if this is causing my PCM engine codes for P060A and P2610.