Actually,
Do check the fuse that supplies current to the O2 sensor heaters.
That may be open..

 

If its a wiring problem I don't know where it would be. The plugs were cleaned, the wiring looks in good shape, and I was getting a response from the sensors.

I will replace the fuse though, no harm there.

Here is a picture of one of the offending O2 sensors. I took them both out and brought them to Autozone to be warrantied out. They had to get 2 from the warehouse so I'll get the new ones tomorrow.

I unhooked the battery for 30 minutes while I drove down there. I came back, hooked it up and noticed my clock was reset to 1:00 (silly British...)

So basically we'll know tomorrow. I'm going to hook it all up again and see how it does. I'll top the tank off at another gas station for good measure.


EDIT: This is also how the original bad O2 sensor looked. The other original did not have any soot on it.

 

good luck sir! I hope one or the other helped.. if you plug them up tomorrow and it works thats all that matters!

 

Thanks Suzuki, just hearing that someone else had the same issue and that it now works is exactly what I needed to hear.

 

Please pay attention.
The O2 sensors have power going to them for the heaters in the O2 sensors.
You must check the fuses are good.

Does this make sense to you?

 

Yes, it makes sense, I said that I was going to do that 2 posts up...

Just a quick question though, I believe there is a OBD2 code for the heating elements, so wouldn't it throw a code if the heating element didn't respond?

(I hope you didn't intend on sounding condescending in your last post jfall, but it does come off that way.)

 

At what kind of mileage are you needing to replace the O2 sensors? I am at 140K, and have no codes, but was thinking it may be time to replace these. When you read the signal in the ECU, what kind of numbers are you hoping to see from the 4 different sensors?

 

Yeah, sorry. I just thought you were blowing me off.
I did not catch you checked the heater fuses.

I get frustrated when there are tons of replies all over the place

The old sensor actually does not look that old!

Sometimes I do actually fix thing on here for people.

But, you are doing fine on your own it looks like.

I would rescan them and see if the new ones are slow or not.

Figure, this is an analogue voltage which goes back to the ECU.
Probably an A/D convertor converts it to a digital number..
Then the ECU changes the duty cycle of the pulse width of the injectors which makes it lean... the sensor changes and has lean voltage and then the cycle repeats..

Wow, I guess a leaky injector would screw that cycle up as it could not lean out the system.


But, I have not encountered a leaky injector.
If Injector cleaner really cleans up leaky injectors, then maybe that may be worth a shot..


Best of luck,
J

 

I just replaced my upstream sensors with the NGK's from amazon.

CEL stayed off for a couple days, then came back on. Upstream o2 codes again.

Checked the plug and found that 2 of the pins in the wire-harness side could back out. Re-connected paying special attention to pushing those wires in. Checked the live data and am getting nice bouncing readings

Long story short, check your female plug pins.

 

All the pins appeared to be where they are supposed to be when I took them apart. I will check though that the pins don't move.

Thanks!