I need some more suggestions please. Had to change the Head gasket out on my 2012 prius(400000+miles) and since then have had the p0012 error code. Have changed the oil etc what seems like a billion times, sometimes with cleaners too. Have replaced all the potentially affected sensors out. Have replaced the timing chain(which was slightly stretched) and the vvt gears etc. Just had to replace out coils too as was getting misfire codes but that was just a recent thing. Engine runs "ok" and when I clear the dtc codes for the first drive it doesn't come back on but it always does on the second drive! Also most likely unrelated passenger airbag remains illuminated "off" even with passenger needing one sitting in seat? Any suggestions please
Yes ocv is changed. Now I m thinking to check oil pump pressure and same time rotate engine manually to see oil circulation inside head. Looks like oil pressure is lost somewhere and it's not reaching vvti phaser resulting in p0012
Yesterday I have changed timing chain set. Phaser is also changed but just found that phaser of 1nzfe is diff from prius cam phaser But still same engine shifting to battery and back is very rough. Lack of engine power Fuel average is bad, Only part left to change is oil pump. I m not sure will it make any difference. Why it's so tough to clear this code Any Prius expert please come forward
