Tundra Trac light on check engine light on flashing 4 lo

Going through this 2012 tundra with the check engine and trac light staying on and the 4 lo flashing. We have gone through the indicator light table that is on the forum. Had a code checker, it said the fuel injectors need flushed, setting up an appointment for that. and something about the transfe case shifter. Just trying to figure out the problem. Replaced the fuel cap, the backup lights work. Any advice would be greatly appreciated

 

Did you check harness under intake manifold (knock sensor)? I think I had similar warning lights when rats chewed through mine, but I think it was pulling codes for the knock sensor which made tracing it easier. Worth at least looking around intake manifold for evidence of rodents.

 

I will check that out, we do have squirrels too

 

Just went through this same sorta thing. A mouse ate the connector off of number 8 injector. This will trigger missfire code and knock sensor codes.

 

Thanks, we will check all the wiring and see if we have some invaders

 

Add me to the " Christmas tree lights" dash.

Tree rats gnawed on my mass air sensor wiring. Fuckers. I don't slow down for them many more.