Hi all, So I have a 04 Dakota and the codes came up and it's the 02 sensors. I was wonder since it appears that 2 on the 02 sensors have gone bad, Should I just replace all three of the 02 sensor. Do they usually all go bad around the same time? Would hate to fix two then have the other one go bad. I would appreciate any input.
Thank You
Kenwood64

 

One code is whining about circuit low, the next is whining about circuit high..... Clear the codes. Drive it, see which one comes back, and how quickly. Both codes are talking about the post-cat O2 sensor.

 

I will clear it first thing in the morning a let you know what happens and which light comes back on first. And Thank You so much for your reply!
Ken

 

Ok so I drove 103 miles for the engine light to come back on. As soon as the light came on I pulled over and plugged it.
And here is what I got. It said 2 issues found.
Detected Issue, 02 sensor #2 P0137,
Then it said Possible issue 02 sensor 1/2 Circuit high P0138.
Thank You
Ken

 

That's just weird. Gotta be a bad connection somewhere, or wires shorting.

 

So your thinking a short in the wire on the 02 sensor or maybe a connection on the 02 sensor?

 

That would be my guess..... Do you have another sensor you can install there?

 

I don't have one to install so I think I'm going to replace them both. RockAuto has NTK or Denso 02 sensors for about $25 a piece.,
Hopefully this will take care of the problem but if not it's a starting point.