Hi I have recieved a P0133 code for 02 sensor bank 1,ect...
I searched tghe forums and found a reference to some one cleaning thire throttle body and fixing the problem. i have also sone this and the problem remains. is this a strait out swap for an 02 sensor os should i check some where else.

I have also had a (noisy valve train problem lately) when accelerating out of overdrive or on the highway above 2500 rpm i can hear the valves chattering. im running good gas and have changed all my plugs and wires. even swapped out 2 coils in the last 2 years. it seemed like the valve noise started about 5 months ago.

Service wise i relpaced my waterpump,timming belt and bearings over 2 years ago and did not hear this problem until 5 months ago, so im thinking it not a timming belt issue. Truck seemed to have an issue idleing a while back but has not done it in a few months.
I know its a lot to go thru but all the problems have been easy to diagnose until not.
the valve chatter has me wondering if something mayjor is about to happen, that i cant afford to fix. so i want to try to get it before it gets me..

any ideas,,,
thanks in advance
bill