knight akkord

I did some research for Check engine light P0136 & P0138 but the answers are so scattered. I want to buy a new o2 sensor but i'm unsure if this is the fix for those engine codes, let alone, which o2 sensor to replace!

I just changed the Catalyic conv and there are still those two codes appearing.

Anyone have any reliable resources on what can be causing this? Google is confusing!

Thanks!

secretaznman4u

hey did you ever figure out what happened? I am having the exact same issue on a 99. repalced 2nd o2 and still light comes on after 400 miles.

mason rocket

Did you clear the codes or just expect it to go away after a few hundred miles like it is "supposed" to ? Sometimes waiting for them to clear themselves does not work. try clearing the codes and seeing what codes pop up again. usually when I have a code unless its obvious or essential to have fixed immediately, I clear them and wait til they come up again. I sometimes do this 2 or 3 times to be sure that is the problem. it might happen immediately or take a few miles. Also other codes might show up related to the problem which would give you a more accurate idea of what is bad. of course if you dont have a scanner... this wont work.