2017 G4 P0137 Code (oxygen sensor / catalyst performance)

[Patrick_Henry]

I just watched part of your video and yikes, go easy on the rev-offs unless you you are trying to clean river water out of it.

Yeah, that made me a little nervous as well. I watched a youtube video of a guy diagnosing one on a Mirage. He was speaking Spanish so I didn't understand a lot of what he was saying but I heard him mention 5K rpm's more than once. The troubleshooting procedure Top Fuel posted mentioned 3500 rpm's minimum for running the testing procedure. I was trying to keep it somewhere in between 3500 and 5000 rpm's. I don't know about the CVT's, mine's a manual. At interstate speeds 70-75 I'm turning over 4K and average around 35-40 mpg. But if I stay around town averaging 50-55 mph turning 2500-3000 rpm the fuel mileage greatly improves to 45-50 mpg. I wish they would've made 5th gear a little taller for the interstate.

[Patrick_Henry]

Dang...I just looked at Autozone to price that downstream sensor... Maybe I need to pull one of these the next time I'm at the salvage yard...

Yeah, that's what I'm talking about. I'd sure like to know what's so special about that particular sensor. I'm going to take a chance on the one I found from AliBaba. If it doesn't work, I won't be out much money. It'll be coming from China so it'll take probably a couple weeks to get here. In the meantime I'll climb under the car and check the plug and clean it up to see if there's maybe there's some corrosion on the pins. I'll come back and update when I figure it out.

[Mitz]

...

https://www.youtube.com/watch?v=q_cCTb7VTHo

Can you take a video capture on graphics format?

[Patrick_Henry]

Can you take a video capture on graphics format?

Yes sir, looks like that downstream sensor was lagging there to me.

https://www.youtube.com/watch?v=lpQaFixObWc

[Mitz]

Yes sir, looks like that downstream sensor was lagging there to me.

https://www.youtube.com/watch?v=lpQaFixObWc

Nice video..

My car is fitted only with the narrow band sensor .. normal values fluctuate from 0.1-0.9V




You can also view the following links for comparison of the 2 sensors



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