My car has been throwing the air back 2 to lean. I cleaned my mass air flow sensor and changed my spark plugs. Had a misfire because I switched connections. Then code came back. Cleared it went on about an hour drive it didn’t come back on. Does anyone know what could have caused this. Anything helps, thank you!

 

Check for leaks in the intake tube and the three PCV hoses. Those hoses should be snug and you shouldn't be able to rotate them by hand. Also unscrew the PCV valve and make sure it rattles when you shake it.

 

Only thought there was 1. Where are they all located?

 

Intake tube to left side valve cover, crossover tube that connects the two valve covers, right side valve cover (PCV valve) to the intake plenum.

There's also a line on the right side of the motor for the brake booster, it goes into the battery box, then turns to a hard line to cross the cowl, then turns rubber again before the brake booster.