2 Problems - 4Hi, and Tire Sensor

Hello All,

I am new to this Forum so my apologies if this is the wrong spot for my post.

I have a 2006 Tacoma SR5 approximately 120000km or 70000miles
Love the Truck but got 2 annoyances.

1. The 4hi doesn't always work. I turn the knob and nothing happens, no flashing no beeping, no dash light. I have to turn the truck on and off several times to get it to work. It is no regularity to it, it may work ten times perfect and then not work....any ideas, bad switch? I don't think it is mechanical for the 4x4 works fine when it goes in.

2. The low tire pressure light is on....it was fine when I first got truck and when I got first service they said the valve needed replacing on the spare so I ordered the part and it has been on ever since, I have tried every possible way the manual says to set the sensors up? Could it be a fluke that a different sensor went at same time?


Max