bucking problems

[Endrődi Gábor]

Hello!

If I use the car day by day everything is fine, but after one day I
did not use it the next day it is  bucking. The buck come out under
serious accelerating . If I flooring the acc pedal it start
accelerating, but after 2 seconds it is shaking and the acceleration
become poor. If I let the pedal come back a short the shaking stops
and the acceleration is very good, so if I do not flooring, just
pushing slowly down it does not start to shaking and bumping. Today
after an hard acceleration the engine stopped for a short while and
after I relased the acc pedal it was running well.

What do you think about it?

The code what I pulled out is 2341 Oxigen sensor limit exceeded.
--
Gabó