Thread: Do I have an O2 sensor problem?

I have an '03 GTP.....

My scan tool is telling me that the O2 sensor test has not been complete (I don't think I have ever reset the DTC's in it since I've owned it ~10 years), however the heated O2 sensor test has completed. I am using a innova 3160b scan tool and the emission test light is "yellow" and the O2 indicator is blinking.

My trusty old basic actron scanner says nothing is wrong, no codes.


Is there even a "regular" O2 sensor test?

I wouldn't even be worried about it except my fuel milage has been steadily declining over the past year....lost about 5 mpg.

Since I am doing other work, might as well fix the O2 sensor while I'm a it!

Originally Posted by BillBoost37

That will reset if the battery has been unhooked or the pcm has lost power. Etiher of these happen lately?

As a matter of fact yes (ABS troubleshooting).... that explains it...

I will keep an eye on it.


Thanks!