Hi everyone

I have a 2004 G35x Sedan and im having a bit of trouble. Yesterday my check engine light came on and i ran the codes which came up:

P0011- Intake Camshaft Position Timing- Over- Advanced (bank 1)
P0021- Intake Camshaft Position Timing- Over- Advanced (Bank 2)

Some background- 2 days ago i went to start my car and it started up and immediatly cut off, i then attempted to start again and it wanted to turn over but wouldnt. I tried again but this time giving some gas and it started up. Then yesterday while i slowed down at a stop sign the car started to shake violently like it was misfiring and check engine came on with the above codes. Right after it cut off after about 30 seconds. I started it again and it ran fine.

I always do oil changes on time with synthtic oil. The car does have oil leaking from the valve cover gaskets from like 3 years ago. I changed the gaskets back then but when my mechanic opened it one of the covers was cracked he repaired it with a bonding solution and i had no issues. Its hard to check the oil level in my car since there is something wrong with the dipstick and theres oil along the whole dipstick when you pull it out.

Please let me know any solutions you guys might have. Is this because of a low oil pressure? The valve cover gasket? Please help i dont want my G to die on me.