O2 issue

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Apr 17, 2025 | 12:23 PM

216._zac

Thread Starter

Joined: Sep 2024

Posts: 11

From: Ohio

O2 issue

Hi I have a 2021 ford mustang GT premium that I recently installed a ess g2 supercharger on and I am having a issue with my bank 2 upstream sensor sent a datalog over to my tuner he said it was going crazy on the log so i unplugged it car ran perfectly so I figured that was my issue bought a new plug replaced it and I’m having the same issue car runs like crap sluggish unless I’m really getting on the gas and sometimes feels like it wants to cut off

Apr 17, 2025 | 01:42 PM

TrimDrip

FudgeDrip

Joined: Jan 2009

Posts: 3,288

From: S. Cal.

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Last edited by TrimDrip; Jul 18, 2025 at 09:00 AM.

Apr 17, 2025 | 01:52 PM

216._zac

Thread Starter

Joined: Sep 2024

Posts: 11

From: Ohio

Quote:

Originally Posted by TrimDrip

That 02 is only in closed loop. That is why wide open throttle (wot) works.....No chance that car was down a while and the o2 harness sat in a puddle? Or maybe someone had trouble unplugging it and they put a strain on the harness while trying to yank the 02 sensor plug loose?

it is possible I have Texas speed long tube headers on it also so could be a issue with the o2 extension wire

Apr 17, 2025 | 02:29 PM

TrimDrip

FudgeDrip

Joined: Jan 2009

Posts: 3,288

From: S. Cal.

.....

Last edited by TrimDrip; Jul 18, 2025 at 09:00 AM.

Apr 17, 2025 | 02:33 PM

216._zac

Thread Starter

Joined: Sep 2024

Posts: 11

From: Ohio

Quote:

Originally Posted by TrimDrip

If you can unplug both ends of it, I would check resistance with a multimeter. You may be able to see corrosion when you unplug it.

yes I actually just did that still looks brand new but to be sure I swapped it with the left side extension ran the exact same as it did before like crap plugged in n perfect unplugged

Apr 17, 2025 | 03:10 PM

TrimDrip

FudgeDrip

Joined: Jan 2009

Posts: 3,288

From: S. Cal.

.....

Last edited by TrimDrip; Jul 18, 2025 at 08:59 AM.

Apr 17, 2025 | 03:28 PM

216._zac

Thread Starter

Joined: Sep 2024

Posts: 11

From: Ohio

Quote:

Originally Posted by TrimDrip

I have worked on fords with corrosion on the sensor itself. It does exactly what he is talking about, it goes absolutely nuts. It will make different patterns on the live data for all the cylinders...when unplugged, it only uses bank 1 by default...that is way safer than running both with that charger on there...

ok because this is the second brand new o2 sensor the first one I returned thinking it was defective or something so I returned it and bought a new one and it’s the same issue so what your saying is running it with the sensor unplugged is the best bet for now? Rather than running it plugged in