1 is for decat the other is 02 sensor thay the same thing im confused

 

Are both sensors still in the system or have you blanked one off? There's 2 sensors part of the depollution system- precat and post cat. The pre cat one is your actual wideband 02 sensor and the one the engine uses for fuelling, the other one is just there to measure the difference between exhaust gas going into and out of the cat. The alarm might be for your main o2 sensor, the other alarm for the depollution system throwing a fault because of the decat but also because the main sensor is faulty.

 

Have you tried resetting the code to see how long it takes to pop back on again?

ive reset it and waiting for it to pop bk up   the cars de catted ive used the lambda spacer 

even with a spacer it'll still throw a code if you;re unlucky, depends on the sensor and map. You can either live with it and keep resetting the error or get a tuner to do a lamda delete. It does get annoying though if it's throwing you into limp mode when the CEL comes on. As long as the main sensor is fine then happy days.

 

I'm guessing it's remapped already, if it is and it's not REVO it should be no bother getting a lamda delete, if it's not then just just ask them to when they map it