I get a P0012 DTC and my engine runs rough under load (it idles fine). I took it to a diagnostic specialist and he said I will need a new engine. He based this diagnosis because he has tried to fix 4 other cars and 3 of them have had a catastrophic engine failure soon after the repair. The repairs he did was replacing the entire timing system (VCT sensors, timing chain, tensioners and phasers). I believe him because he did not offer to do the work or recommend a shop. He actually refused to do the work and only charged me an hour of labor. He said it was caused by using oil that was too thick. My question is, has anyone else had this happen to them? What was the fix? Any other problems?