Car had thrown 171 codes about once a year since I bought it three years ago. They always go away by the hits cycle. But now Car is cam swapped with a rotofab, ls7 maf and solo catback. Car had the rear o2 sensors deleted with tune. Driving last night got a cel for both the listed codes. Cleared the code and got it again today on a quick trip. Popped the hood and noticed the air filter box to maf was actually loosed and flopping about. Is that enough to throw the codes listed??