P0021 Infiniti -

Question

SHOULD I JUST REPLACE THE SENSOR?

Answer 1

Start by replacing the oil and oil filter use 5w-30 if you have not replaced the oil in the last 4k miles, alot of people use Mobil 1 oil. Also if you are low on oil the light can come on.

 

Since the Intake valve timing control solenoid valve uses oil flow to control timing, dirty oil or low oil can cause the valve to stuck open or close. Before replacing the valve, change engine oil and filter and reset engine code. If the code comes back you can remove the Intake valve timing control solenoid and clean it with brake cleaner.