Engine lights on trac off VCF 4LO

This came on last week.
(5.7 crew)
Seen on YouTube disconnect battery terminal.(did that) next morning came back on again
Check gas cap and found rubber o ring gasket were cracked..replace it from old rav4 caps. Disconnect battery term. It was fine for almost a week then this morning those lights WENT ON again!
Whats going on???
Help...

 

I have a 2012 with the 4.6L engine. I had the same lights the other day and it went into limp mode. Scan shows secondary air injection problem. I will be getting a by pass kit very soon.

 

Looks like im getting same problem.when scanned it p2440 and read that it is air injection..5.7 2007 injection located between manifold and firewall..its going be expensive

 

Mine also came up P2440 and P1604 all related to the air injection. I just ordered the by pass kit from Hewitt- Tech for $349.00. The Toyota tech at the dealer told me today that the kit does work and one of the techs actually installed it on his Toyota and hasn’t had any problems for over a year. You might want to go that route too.

 

Keep in mind too that I’m in Virginia so I don’t have to pass an emissions test. It may still pass emissions anyway since the injection system only works for a minute or two at start up. That may be a question better suited to the company though.