Is the Rear O2 sensor on a 260 only used to check the pre cat or does it have another purpose?
Ive disabled the rear O2 using ECUflash. :smthumbupYou will get a CEL shortly unless you disable the fault in the ECU or swap to rom ID 99270000. The sensor gets warm as it's heated, so make sure it's not touching anything.
Gray, i uploaded my rom to here a while back... (top post)It's disabled in the EDM Ralliart rom.