HI gang
building off road vitara and want to eliminate the 2 rear / downstream  O2 sensors after cleaning out both shot/bad cat converters.

 - anyone out there successfully done that by having the computer reprogrammed or other devices / methods ??

- who / where  does Suzuki engine computer reprogramming to eliminate the rear 02 sensors???

amazing - all u guys out there with off road suzis and no one has eliminated the  cat (s) and rear/downstream 02 sensors?

amazing - all u guys out there with off road suzis and no one has eliminated the  cat (s) and rear/downstream 02 sensors?

My 06 2.7L will throw a code without cats.  It will also throw a code it the two 02 cat out sensors are not somewhat close, or not tracking similar to first sensor.  You can run with a standing alarm, but without checking you will not know when another code comes in.
I do not know of anyone that can reprogram the Suzuki ECM, other than the 3.6L.  The 3.6 can be reprogramed because it is a joint engine with Chevrolet, so it has been added to most reprogram tools.

%Thanks for the info but I want to find someone who has used 02 eliminators and / or 02 extenders with good success since the computer can not be redone

You could probably purchase any cat delete dummy O2 sensor and just wire it with the plug needed for the Suzuki.  The ecm is looking for the front sensor to constably change from 0-1 volt, but it is looking for the rear sensor to be a steady reading near to .5 volts.  If it is following the reading of the front sensor, the ecm sets the fault.  The cat doing its thing causes a steady O2 content in the exhaust, thus it is looking for that steady reading.