Dremel said:wira1.8 and putra don't have.. gti has it.. ecu code 0450 and 2468
risyia said:From what I know your 4G93 engine is the first generation of 4G93 for Proton and it is the more powerful version compared to the later 4G93 installed in Proton.
More power but bad in terms of emission control maybe that is why Proton changed to a lesser power, more eco friendly engine in the later version.
So your version has no catalytic converter and no O2 sensor.
risyia said:What RSI said is true, an O2 sensor looks like a spark plug attached to the exhaust pipe.
You find one on your exhaust pipe, well that is your O2 sensor.
But not all EFI engine has O2 sensor, I am quite sure my Putra engine does not have an O2 sensor.