For instance, if the MAF is dirty or whatever the case may be, would it cause one of the A/F sensors to trip? I have a Bank 1 Sensor 1 malfunction. I also realize that after cleaning the engine bay, I had to re-clean the MAF sensor, because the car was idling rough. I’ve also cleaned the throttle body and IACV.

 

That can happen, actually happened to me last week and I had not cleaned the MAF in a while.

 

Clean the MAF, clear the code. See if it you get lucky. If it comes back, it's the sensor. It will be the sensor though. A MAF issue would effect both banks, not just B1.

 

Theoretically yes, but in almost every case, a dirty/faulty MAF will throw a Bank One code only.

 

art has been drilling this down my thick skull.

Salim