check engine light on again / off again

Hi to all
I have had a check engine light issue for three years.
In 2010 I had a code PO152 which indicated a bank 1, sensor 2 failure. They replaced it and a day or two later the check engine light came back on.
It goes on for two or three days, then corrects itself. When it is on, the truck uses a lot of fuel but runs like a kitten when it is off.
I'm reluctant to have anything else changed at Toyota because the cost is prohibitive and the problem seems to self correct. However, I have a good friendly mechanic at a local shop who I talk with about this problem and may have something done in the future.
If anybody reads this and has any input/experience they would like to share, I'm all ears....er....eyes.
Billbo

 

Pull the code again and see if it is the same?

 

How many miles on your engine? Does the problem come and go with temperature change? Have you noticed that it comes and goes when you fall below a half tank/fill up?

 

try disconnecting the battery and connecting it again, this should flash the ecu and see if it comes up again... if it does, check the code again it may be a different bank

 

Hi!
I have 196,000 Km. It may come on more frequently when the tank is low but but since it self corrects in a day or two, I really can't say for sure.