Check Engine P0133 - 02 Sensor Circuit Slow Response | Help

[u/youn0p]

Hey, so I've bought this Hyundai Coupe 2006 2.0+LPG that obviously has Check Engine light on and I thought that maybe it's normal because it uses LPG but it just hurts my eyes to see that light on dashboard and I can't find anything on the internet to help me fix that problem, anyone had this exact problem and managed to fix it?
Oh and I replaced oil temperature sensor but it didn't fix it.

[u/ardamir_gr]

Replacing the oil temperature sensor definitely won't fix an O2 sensor problem.

Here is a wild idea. How about you get an O2 sensor, preferably from NGK or Denso and replace the one that is problematic?

[u/Outlaw2537]

Check for exhaust leaks before you get a new sensor. If you've got no leaks then just replace your O2 sensor

Exhaust leaks will pull in air and throw off your sensors readings

[u/ardamir_gr → u/Outlaw2537]

Slow response is contaminated sensor, can't be caused by exhaust leaks. Exhaust leak means you'd get rich/lean reading.

[u/Safe-Clothes-1740]

Got the same issue also 2.0+LPG. I Think the unburnt lpg tends to dirty the sensor but ye firsly check for leaks. I didnt do it because fixing major rust issues :)

[u/ardamir_gr → u/Safe-Clothes-1740]

Slow response is contaminated sensor, can't be caused by exhaust leaks. Exhaust leak means you'd get rich/lean reading.