DTCs: P0172, P0175, P0101 - FIXED!

Since buying my 2005 Tundra DC 4.7L in May/June of 2024, the check engine light would pop on showing trouble codes P0172, P0175, P0101 that I would just clear about once a week or every other week.

After cleaning the throttle body and MAF to fix some surging and high idle on cold starts, I noticed that the one nut was very loose but the 3 bolts were tight. One of the guys on here commented that it looked like there was corrosion on the throttle body and this was likely a source of a leak. I didn't immediately connect this to my weekly trouble codes, but I haven't had the check engine light come back on since then, approximately 3-4 months.
Below photo prior to cleaning with corrosion in top right corner of throttle body.


Throttle body after cleaning and corrosion also removed:

Vehicle runs great. No Idea if the loose nut is a common issue on the throttle body, but maybe this helps someone.

 

Good work. I’m sure it’ll help someone at some time

 

Saving this thread for later. I also have p0172 and p0175

 

Doesn't @FrenchToasty pop same/similar codes due to having long tube headers?

 

Nope just p420

 

Ah, the most flowery of all codes.