can you put a thicker oil in the engine? the tolerances are awfully tight...and the many OHC setup puts a huge strain on cold pumping startup to get oil up top...
that being said, most of my experience with P0019 and the like has been with GM 3.6VVT's. What the code is saying is that he cannot correlate the position, not that they are out of position. cheap bux is change the sensor. when really really hot the oil is much thinner and flows a lot more - but you need absolute pressure to operate the phasers...