Hi

My focus st170 has come up with a p0602 code. i've searched everywhere and can't seem to find much infomation regarding the fault. My main worry is how serious it is. The garage couldn't find anything regaring it either so simply reset the fault. Now the light has come on again, i'm guesting it could be the same fault.

Any help would be appreciated

 

Engine control module acoding to autodata

 

Could be related to the lambda sensor's heater circuit. May be worth changing them and see if it cures it.