hi all,i have a 01 wrx uk model and it has an engine light on. I pluged into it and its showing 2 faults, front 02 sensor and exhaust temp sensor. i replaced the 02 sensor with denso replacment but its still showing the same faults. i checked the signal wire with a voltmeter and its not switching,just staying at 3.82v. I then checked emissions and they all seem to be perfect it seems to be running lean if anything. Im thinking someone has been at ecu. can anyone help??

 

Search on here for EGT bypass ( Exhaust gas temperature ). What did you do to fix the exhaust temp code ?

 

Has it got a decat fitted?

 

i didnt do anything to fix the exhaust temp fault,should that effect the switching of the lamda??? only have cat back system but i do hear the odd rumble in exhaust like a loose cat,but emissions are good?? my head is wrecked with this fault