Hi to all, recently posted about a fault i had with a check engine light, now i know the problem was the oxygen sensor, i reset the fault and its has re-occured. The car has been decatted and this is where i have the problem. Im getting told different things about the fault, one is saying the sensor will not read correct anyway because of the decat and therefore will keep signalling a fault, another is saying it makes no difference and should get it replaced. Could someone tell me what i need to do and if the sensor not working will cause a problem. any help much appreciated.