A little confused with O2 codes

[07 Boss]

So I kept getting a stuck rich code on my bank 1 sensor. Just put a new sensor in along with a harness extension. My last two sensors I soldered in extra wire for it to reach the main harness. This time I used some extensions just for ease. Well now I get P2195 stuck lean. It has been the same Shelby tune for the last 5 or so years. The only thing I've done to the car recently was a new front cover and different Meziere. Here is a quick vid of my A/F guage idleing in my garage.

https://www.youtube.com/watch?v=_V4WmBxT840


If you watch the vid (kinda boring) you can see the A?F ratio drop to way rich. A couple blips of the throttle then it returns to normal.
And then it creeps to full lean.

I don't get any slow response or heater circuit codes. With the previous stuck rich code and now the stuck lean code I am leaning toward a wiring issue. I did a semi wire tuck a few years ago but I never touched the O2 wires. I did swing the whole harness around the engine a little bit so the location of the connector for that side is harder to reach.

Anyways, I hate wiring and such, so is there other things I should be checking before diving into rewiring the sensor to the ECU? I haven't datalogged yet as my home computer is being hinky and I don't have a laptop. I could probably set up a log with short and long fuel trims and fuel pressure. What else should I be looking at as far as the logging?

 

[BruceH]

Have you tried putting the old sensor back in or did this start with the old sensor?

 

[07 Boss]

Have you tried putting the old sensor back in or did this start with the old sensor?

I replaced the sensor because I was getting a "stuck rich" code.

I have two other unopened (Motorcraft) O2 sensors I can swap in there but I really doubt that is the issue. But I might try it this weekend for shits and giggles.

 

[BruceH]

I replaced the sensor because I was getting a "stuck rich" code.

I have two other unopened (Motorcraft) O2 sensors I can swap in there but I really doubt that is the issue. But I might try it this weekend for shits and giggles.

I see that you included that info in the original post now that I reread it.

Going from stuck rich to stuck lean is kinda odd imo. I'd try a new sensor and I'd also try to swap the extension before digging into the wiring.

Besides the wiring or sensor it could be a flaky injector, not too likely imo but something to consider.

 

[07 Boss]

I see that you included that info in the original post now that I reread it.

Going from stuck rich to stuck lean is kinda odd imo. I'd try a new sensor and I'd also try to swap the extension before digging into the wiring.

Besides the wiring or sensor it could be a flaky injector, not too likely imo but something to consider.

That's what kind of baffles me. I pulled into the garage this evening and saw the old sensor laying there. Gonna throw that one back on there and see what happens.

 

[boomer9999]

I'm just curious about the guage and the stock O2 sensors. Are they compatible?

I thought the factory 02's switched between a low voltage and a high voltage, not like linear output from a wideband.

Sorry but I don't know how to solve your problem. The only time I ever experienced a stuck lean code is when I had a exhaust manifold leak because of broken studs and failed gaskets and warping on my 97 5.4l f150.

 

[07 Boss]

I'm just curious about the guage and the stock O2 sensors. Are they compatible?

I thought the factory 02's switched between a low voltage and a high voltage, not like linear output from a wideband.

Sorry but I don't know how to solve your problem. The only time I ever experienced a stuck lean code is when I had a exhaust manifold leak because of broken studs and failed gaskets and warping on my 97 5.4l f150.

I think all O2 sensors put out between 0v-1v. But I could be wrong. My gauge has it's own sensor, it doesn't piggy back off the stocker.

 

[o2sys]

Have you checked the hose coupler on the throttle body to CAI?

Maybe the clamp has failed or is not sealed tightly causing a leak.

Had a same issue, the clamp failed which I couldn't see because the tightening screw was on the bottom.

 

[07 Boss]

Have you checked the hose coupler on the throttle body to CAI?

Maybe the clamp has failed or is not sealed tightly causing a leak.

Had a same issue, the clamp failed which I couldn't see because the tightening screw was on the bottom.

It was on good last week but I will double check it anyways. but a leak that big would cause lean issues on both sides. Seems to be some kind of dynamic issue on only the right bank.

 

[86GT351]

Have you checked the hose coupler on the throttle body to CAI?

Maybe the clamp has failed or is not sealed tightly causing a leak.

Had a same issue, the clamp failed which I couldn't see because the tightening screw was on the bottom.

Good thought however that would most likely generate a code for both banks!