Well see, when you do not say anything about what you have done, one is left to make assumptions. If you would take some time to fully state what you have done, assumptions would not have to be made.

If the code remained the same, the next order of business is to check continuity on all of the wires from the O2 sensor to the PCM. The wiring diagram can be found in the link I posted above.

 

Good morning,
I have the same OBD code P0155. Is it possible, that the motorsound is a bit louder or is it another problem? ;-)
Thanks for help...