Thread: Question regarding the lack of an O2 sensor.

Okay, so my car has no stock O2 sensor, but I'm still reading values on the O2 sensor voltage area of the data screen. I'm wondering if having the O2 sensor missing (with the flag disabled) will still affect my tune if I'm using the 192+value sections in my fuel maps (O2 feedback, I think it's called). Does the O2 sensor flag disable EVERYTHING to do with the O2 sensors in regards to the tune? Is there any reason to remove these sections and use regular values instead?

Thanks.

I run without an O2 sensor, I have it disabled so that the ECU doesn't even bother going into closed loop mode. As for 192 parts of maps, leave them be, they will function just fine. It's a good way to achieve negative values, 192 = 0, so 188 = -4 fuel.

Interesting, I never even considered a negative fuel value, but I suppose it makes sense if your injector sizing is setup in such a way that you need negative values on the lower sides of your map. Either way, it won't matter much once the SA version comes out anyway, right?

@Vadim, how would you go disabling the 02 from the ecu?

Easy,

Closed loop, uncheck the "Enable Closed Loop" tickbox


Then, go to Setup -> Extras ->DTC Mask
Uncheck 02 sensor to avoid getting a check engine light

Done!

thanks