Engine running lean

In the past few months I have replaced the mass air flow sensor, the fuel pump, the ignition coil, the bank one sensor 2 sensor. And my engine light remains on. My truck is 2006 Toyota tundra sr5 4.7 liter v8 with 273,000. The truck runs great but I'm trying to fix this engine light situation. any ideas?

 

What is the code?

What brand/part number of sensor did you replace with? Where'd you buy it? Did you cut the O2 sensor harness(es) at any point?

Has the intake ever been off the truck?

Have you tugged on ALL the quick-connect fuel lines in the engine bay, especially on the driver's side of the engine bay, to make sure none are loose at the quick-connect fitting?

If the lean code is bank 2 only, can you snap and upload a picture of the engine bay from the passenger side, ideally from about where the front tire is, so we can see vacuum hose routing? Interested in the hoses above and around the passenger head, specifically, going from the head to the airbox.

 

Check those crusty old vacuum hoses. Many split at the ends and start leaking. Some have enough slack you can trim the split ends off and reattach.

 

Mass air flow sensor is common issue, make sure you get hitachi Toyota sensor for 05/06 models. I had bad luck with one I put in from an auto parts store. You can also try cleaning the throttle body. What is the code? P0101, p0170?

 

Without the code your truck is spitting out.

everybody is shooting from the hip w/ "maybes"