hi everyone,, just got the emisions light come on and have fault codes 0170 (fuel trim malfunction) and code 0420 (Catalyst System Efficiency Below Threshold) (Bank 1)any one have any ideas how to cure these ? fitted a new front 02 sensor last week...appriciate any help .many thanks ..sorry guys and girls just found what im looking for on here ....so dont bother replying,, thanks