NEW MAF SENSOR INTO TUNDRA 4.6L

I recently changed my MAF sensor in my tundra since my old one it was throwing p0101 and p0175, ever since I’m getting worse MPG I was getting before 18-21 Hwy 15-16 CITY, i replaced it with a OEM MAF sensor from the dealer, is there a procedure or a calibration i need a shop to do? I’ve already taken my negative battery cable off to reset the ECU still getting the same result, pissing me off at this point, I did change my spark plugs at the same time, no misfires or codes with the plugs so i don’t think it’s my plugs, any recommendations? appreciate it guys

 

Air filter good n' clean? Path to filter clear of obstructions (no dead mouse inside tube before air cleaner).

Last restort is to test the MAF(s) per FSM.

 

15-16 mpg city seems suspiciously high. Am guessing the old maf was reading low and the ecu was running the engine lean because of it. You are now getting more normal tundra mileage because the afr is now where Toyota designed it to be. No surprise tht it finally threw a code for it.