Seems to happen only at start up. And usually just the P0020, but if I drive it for a week somewhere in that timeline the 0022 code follows. Been using the same oil and filter since I bought it. Are the VCT sensors under the valve cover? Reason I'm asking, The light first went off on a bumpy road going up to a cabin. A lot of vibration. I can reset the error code and drive all day, no power loss no issues, but once I shut the car off and restart it, it comes back. I datalogged and saw that the alternator voltage was all over the place. 12.5 to 14.98 and went to, don't laugh, autozone, they hooked up and said bad diode ijn the alternator. I datalogged a few days ago and voltage was steady.