P0012 code

Vvt controller?

 

Cam gear.

 

Just pull the valve covers take a peak at the gears/actuators. I seriously doubt that's your problem, unless it's toasted.

 

Do you have a part number by chance?

 

Yeah the cam shaft is brand new. New head gasket .heads and valves we're worked on at the shop. Only things I can think of is he didn't put the timing on correctly but I don't think it would run good then . And the other is this sensor .

 

Did they mill the heads? If they did that will throw the timeng off. No solution but new heads.

I think they are different part numbers. I'm tearing down a 1GR-FE tonight, i'll see if part numbers are stamped on OCV's.

 

Yeah they did . Really? Never heard of that . How come.

 

Here's the OEM's I just pulled.

You let some guy in his back yard do a head gasket job?

You are not supposed to mill the surface of the heads.

Dood, that's literally in like Toyota Training manual 101 (I think it's 101, maybe 105, have to check)

The reason is because the distance between the Cam and Crank has been altered.

Stop by a dealership and ask a Toyota Master Mechanic

 

Milling the surface of the heads will make the timing slighted retarded.

 

The guy knows his shit. Used to have a shop. I have read post after post of ppl getting theor heads machined and a valve job done while doing a head gasket job?

 

Any way to fix this? Why is it only just one sensor going off then? With code p0012 .runs good. Just have the code one. No shaking or vibrating .

 

Post from a 4runner forum

i had mine fixed last month with the same problem a blown head gasket, coolant drip & a warped right cylinder head. a local Toyota dealer did the job for me & truly it did cost me a fortune. they machined my warped head, also checked the left cylinder head & replaced both gaskets, replaced the water pump

 

If the chain/gears were mechanically out of time you'd have something like a p0340 "camshaft position sensor". I'm pretty sure p0012 is a performance /range of movement code. That's a test on the full range of movement of the adjustable gear at that bank (it failed the test, so its setting the code). Of the ocv does not open fully or is clogged the gear wont have it's full range.

Move the valve to the other bank, See if the code follows. Much faster than tearing the engine back apart

 

Putting a new ocv in. As it's not hard to access. Yeah it's over retarded is what it says .

 

The soleinoids are different from bank one and bank two.

 

Still can figure it out .

 

What do u mean by vvt controller? For p0012?

 

Guys, hopefully I could get some guidance
In my case the order of events is reversed
I am getting the codes P0012 (current and pending), P0022 (only pending) after installing new OCVs and cleaning the filters.
I noticed on the driver’s side filter, one of the 4 “tabs” was broken. This is the first time I have cleaned them.

I have cleared the codes 3 times and everything is good for a couple of days before getting the codes again. Should I test the old OCVs instead? Maybe use Marvel Mistery Oil in the engine? Open the valve covers to clean?

 

What compelled you to swap the OCVs and clean filters, were you seeing an error code at the time? Not exactly a routine maintenance item. Also what other work has been done on the engine prior to the original problem you were troubleshooting?

Strangest VVT error troubleshoot I've seen (here or on another board) the guy found the oil return passage below the OCV was clogged with sludge. He roto-rooted it out somehow and the problem cleared, but only found it after throwing expensive parts including the VVT actuator/sprocket assembly. Really weird case, and the sludge on top of the head and under valve cover wasn't that bad.

 

craigs1, thanks a lot writting.

To your questions. I was not seeing an error code at the time before cleaning the filters and changing the OCVs.
I bought my Taco 2 years ago knowing it needed work. I've been putting the work on it on my leisure time and have been learning a lot. I have been facing a handful of subtle problems lately. Low gas mileage combined with low RPMs acceleration problems lead me to think it could be the OCVs.
Before the OCVs, I cleaned the Throttle Body and the MAF sensor. Since I didn't notice any difference, I proceeded to clean the easiest filter to clean (on the passenger side). It was very dirty, so this is why I decided to get the new OCVs and clean the driver's side filter.
Right after this is when I started to get the P0012 and P0022 codes. I try to clear them as fast as I can so I can see which one comes first. I have noticed they get triggered only one at a time, not necessarily one each time.

Now I am thinking on changing back the old OCVs (probably return the new ones). Also I think I need to check the timing chain, probably there's a tensioner problem or the chain started to stretch.

Your statement on this not being a routine maintenance leads me to think I need to get the old OCVs back. Regarding the sludge, I notice during the first oil changes there was a lot of build up even on the inside of the oil cap. Do you recommend to cycle the oil with Marvel Mysterious Oil or something similar?

Regarding the engine work, nothing our of the ordinary. I replaced a year ago, the water pump, radiator, idle pulleys, alternator. Not engine related: front end bushings. Probably the only thing not oem that I did most recently was the URD fuel pump, but this is actually helping a lot on the highway.

So, you think I am on the right path for the steps I am trying to take?

Thank you again!​