All started about a week ago on Saturday when I had the car idling for about 30 minutes since it was cold outside and was warmer inside. As soon as I drove off, all of the sudden the car started shuddering pretty badly at idle, no lights or anything came on though so I didn't think much of it. Drove about another 1/4 mile and it was fine again, running smooth at red lights. Then about 10 seconds later after it fixed itself I got the lovely check engine light, accompanied by an VSC light. Drove home, looked at the codes and it was a 1349. Car seemed to have fixed itself though so I cleared them and went on my way. Fast forward to about an hour ago, while in the drive thru of Starbucks it started shuddering and shaking again, which is funny cause it's been idling for a while too in this case. I thought it would fix itself as I drove home but oh no this time it made me feel like my car was cammed as I was slowing on red lights. I read earlier during the first occurrence that the oil something could be clogged so as you know the best way to unclog is open her up, and it being early in the morning with zero cars I was almost hitting redline all the way up to 3rd gear, on the calm city streets. However the issue didn't seem to go away. Pulled into my driveway, and finally it decided it had fixed itself. Running smooth again. Grabbed the code reader and got 1349 as well as 1346.

So current situation: Code P1349 and P1346, intermittent rough idle/decel

Every thread I looked at seemed to have a slightly different situation and therefore always a different solution. What do y'all think? There seems to be a consensus on the oil control valve being a leading issue, but some people with my exact codes and situation have been told the timing belt could've slipped? I'm at 145k miles and the timing belt was replaced at 99k according to the little sticker on the engine cover. Timing belt however was removed a couple hundred miles ago as I had the front main seal replaced since that was leaking oil nicely. I don't have any misfires though.. yet.


Also side issue; the power steering doesn't work for like 30-60 seconds after a cold cold start. The needle has got to be well below the lowest line on the temp gauge for it to do this, but in 40 degree California winter weather it does it in the morning. Anyway yea it just doesn't work then switches on. Also there's a slight power steering whine at all times, its not loud its just noticeable when the car is idling. Makes it hard to appreciate the muffler delete when all I hear is the eeeeeeeeeeeee from the power steering. Does this mean I have to replace the ps pump?

 

First thing is, when you know something is wrong with the car, the worst thing you could do is drive it like ya stole it. Especially if you think the timing belt jumped. If it is the T-belt you're damn lucky you didn't explode the engine. NOTHING fixes itself.
The power steering noise could be a bad bearing in the PS pump. We can't tell with an explanation, we'd have to hear it. Try wiggling the pulley in and out to see if it moves. (with the engine off of course)

 

To be fair, I didn't read the possibility of that until I got home. Plus now that I think of it I doubt the car would be running weird intermittently if the timing belt jumped, it would probably be doing it all the time and misfiring too.

 

In case of a skipped timing belt, the problem occurs always and you'd also get the code P1351 as is like this thread.

Judging from codes P1349 and P1346, I'd rather think it a problem like this below Youtube video. Watch after 2:35 if you are busy. When an OCV is about to die, the problem like this type of intermittent sometimes occurs.