check engine light came on

[bjm442]

So I took the car in sine I have it under the CPO. They took a look at it and said the MAF was bad. They replace the part and sent me on my way. A week later the light came back on and I took it in. This time they said that the rubber hose for the intake boot is bad. I passed on getting the part fixed since it was $350 to get it done. Any one know what might need to get fix? I ask if it was the one from the MAF to the intake, they said it was the lower one. I took a look when I got home and I don't see a lower one, am I missing something?