Been reading all these threads covering the p0011, 21, 14, and 24 codes (im having all 4 simultaneously) and tried numerous methods to solve this problem so hang in with me while I explain my situation. Bought the car (08 with 39k) incredibly low for how many miles it had, so when I got in and hooked up my pocket reader and saw the codes, I KNEW I might spend a few g's in replacement parts.

So far I've replaced...
oil twice (5w30 full synth. Once cold and once hot)
BOTH sensor timing covers w/wiring (sensor 0011 had 3 of 4 pins missing from physical damage)
Checked all my fuses and wiring
Pulled the front cover off my block and checked the chain and gears.
Mechanical timing of the DOHC is perfect. Nothing has wear and tear. In fact, the internals look newer than the block itself!
And I've done numerous reset/relearns throughout the entire process.

Is there something I'm missing?

 

I have 0011, 0021 popping

Car runs fine it just has the SES light.

From what I've read it's either the respective solenoids/sensors being dirty/damaged OR it was the timing chain cover gasket being compromised (found a post on another site where the oil galley gasket was ruptured).

To be frank, when I was researching the solution I found that one of the above being resolved would solve the problem. Have you tried replacing the VVT solenoid or cam position sensors w/ known working ones? Maybe from a local Z owner's engine?

I haven't fixed the issue myself, was going to bring to a local shop because I have a small oil leak coming from the front of the motor so my hope is it's the timing chain cover gasket that needs replacement, while it's pricey at least it'll be said and done. Now you've got me a little worried it's something more

 

Can anyone help me resolve this situation? I will be traveling for work for a few more weeks and when I get home I'll have plenty of time/money to spend on the Z, but I'd like to get rid of this problem first! Then comes coilovers, bbk, wheels and tires!