Prius gen 2 2007 DTC P0012,P0011 need solution

Maybe you have timing change stretch with the low oil problem and oil consumption problem with your mileage the low gas mileage the VVTI part and all of that seems to me like you may be in trouble in the valve train department stretched chain etc It is certainly something worth looking into You may be able to roll the car with the valve cover off or rather roll the engine around with the valve cover off and see how much slop is actually in the chain Good luck my friend.

 

So all the lobes on that camshaft look nice and shiny no flat spots etc every one of them those are activating your valves your cam phaser is coming from a used car usually cam phasers and my experience don't really go too crazy they usually work pretty much as expected or if they do go bad I haven't seen a lot of them and changed them myself or anything like that I do know there's been some problems with timing chain stretch in some of these 1 NZ engines. That has to be measured kind of carefully there's also a timing chain tensioner and the old days I've seen people play around with the old manual tensioners adding a little space and screwing it in further to tighten up on the chain to see if the poor running will somewhat subside and if it does then they know that their timing chain tensioner cannot take up the excess slack that they just did by adding the little spacer to the end of the tip on the manual timing chain tensioner. I read a post where others have had codes about the timing chain business and it turns out the timing chain was stretched enough to cause all the hullabaloo and I guess once it was changed new tensioner fitted and reassembled everything worked as expected You've got to look at the teeth on all your sprockets and cam phasers too there are specifications I think in the factory manual and most of this can be measured with dial calipers and things like that. It's close inspection that generally reveals the problem so you have to take your time with that right the information and measurements down compare them to what's in the factory manual for specifications and go from there.