I did a Throttle Body clean and cleaned the sensors using these two videos. The Throttle Body was very clean already so it looks like it was fine. The other sensors were fine too. I was hoping it would improve the MPG but I really suspect both my cats are bad.

CRC Mass Air Flow Sensor Cleaner, 4.5 Wt Oz, 05610

CRC 05078 Throttle Body and Air-Intake Cleaner – 12 Wt Oz.