This will give ya an idea. The code should tell ya which one.

 

That's low miles, may need more oil changes.

 

Why more oil changes?

 

Only has 9300 miles.

 

Sorry, that is 93000 miles and today I went to move the car and the check engine light disappeared

 

What oil are you using?

 

If it’s just the solenoid it’s literally a ten minute job. The reason why people are asking you about oil is that some believe that extended oil change intervals are going to cause problems with the VVTI systems on these cars.