I've never seen this but I pulled my o2 sensor and it has an orange brown build up on it. Is that normal in a fit? All mine have always showed carbon build up but not what looks like rust. Any help would be great. Thx

 

Do you use a lot of fuel system cleaners? It's probably lead poisoning.

 

Not a lot but I have used some over the past couple of weeks. So is there a cure or is it dead?

 

I think it's gone, or on its way out. I would change it, personally.

 

Ive personally never done this in the past because I would just simply buy a new O2 sensor. But you could try cleaning it, let it sit in some gasoline over night. Then let it air dry.....try not to get any in the wiring just to be safe. And maybe pass a cleaning brush over it...

 

I think I'm gonna chunk it and get a new on 140000 on an o2 sensor should be a long enough life. Thanks for the help

 

Just FYI, theoretically speaking, as long as it's not throwing a code, you should be ok, as it's still doing its job. But it's probably going to throw a code in, and as long as you have it out, just change it.

 

You can use vinegar soak the sensor end in a little cup for 30 mins let it dry for 40 mins or so.

is this sensor for your exhaust header or cat converter?

I have a damn near new cat sensor id sell for cheap I tried using it for my megan down pipe cel fix but it didn't work, it still sensed stronger flow with the designator.
Its a walker goes for 120 new just putting it out there for anyone trying to save money..

 

See that's what has me bewildered it is not throwing an O2 code but I'm having misfiring from multiple cylinders and I have replaced everything but the O2 sensor. I even did the cam position sensor. I'm out of simple things to replace. I seriously doubt the cat converter is bad. So I'm going with O2 sensor. Its the Bank 1 sensor.

 

Similar Honda story:

I had a 6th gen Civic HX coupe, the high-efficiency model. At about 90K, engine started running really rough, coughing and sputtering, misfiring like crazy. This design had two sensors, one up at the manifold and one in the back. The one in the back was the culprit. If it had been any of the other Civics, $200 repair at a dealership. But because it was the HX model, it had one extra wire (!) that differentiated it from all the other sensors and also made it incompatible with them.

Price for just the part? $550 (gulp). Install not included. Then a year later, Bosch comes out with an aftermarket one for 1/2 price. Go figure.

 

If you're replacing it, there are lots of aftermarket brands out there. Walker, Bosch, and NGK (NTK).

But if you're still hoping that it could be cleaned, that vinegar soak works as well as brake cleaner. Let it soak for a while and air dry.

 

@barginguy that's the exact same thing that mine is doing. Terrible gas mileage like a quarter of what it should be, and it sounds like I'm driving a model T. Never thought it could be the rear one...thx for the insight.

 

On my next day off I'm gonna pull em both and soak them overnight in vinegar or gas haven't decided which. I just cant drive it any longer like it is running now.

 

Here is some info on soaking the sensor:

8th Generation Honda Civic Forum

It's common on FI Civics to not have any codes thrown and have issues.. but usually with them it'll still work fine in normal driving.

 

they should be changed every 100,000 miles. so i just buy a new one