2G Did I kill my new O2?

[chrisman287]

I had an old AEM UEGO wired to front O2 for narrowband simulation. I noticed in my logs that it wouldn't move from .8v

I decided to put the stock front O2 in (brand new Denso), connected the stock wire back to the ECU but by accident left AEM wideband gauge assigned to the pin even though in the wideband drop down it was undefined. It wouldn't move from .2v but had AEM WBGauge displayed and could see that moving

I changed the pin assignment back to factory/none and it's still at .2v and not moving

Did I kill the sensor? Or do I not have something set up correctly? 10.02 was when I had wrong pin assigned

 

[chrisman287]

Is it possible that I messed up the ECU?

 

[chrisman287]

Welp ordered a super cheap o2 just to see if it’s any different.

 

[habitatguy187]

I don’t see this causing any problems. There’s likely something else going on line a wiring issue/bad connection

 

[chrisman287]

I don’t see this causing any problems. There’s likely something else going on line a wiring issue/bad connection

I’m going to check the wire at the ECU. I put another sensor and it’s still at .2v

 

[99dsmer4g63]

Use your multi meter that you bought. Check to make sure the wire is not shorted to ground and not an open circuit either.

-Daniel

 

[DiSeM]

Did you supply ground to the brown wire coming from the gauge? If it isn't grounded then ECM Link will not be getting a reading from the white wire going to your ECU.

 

[chrisman287]

Did you supply ground to the brown wire coming from the gauge? If it isn't grounded then ECM Link will not be getting a reading from the white wire going to your ECU.

I put it back to stock.

 

[chrisman287]

I haven’t had much time to do any diagnosing. I did find this post so I will be doing that soon:
https://www.dsmtuners.com/threads/o2-sensor-wiring-testing-operation-changing-bypassing.245283/

I did redo the wiring at the ECU and decided to take it apart but don’t see anything wrong here if anyone can take a look

You must be logged in to view this image or video.

You must be logged in to view this image or video.

 

[chrisman287]

Okay so key on I have 12v to red wire. I disconnected the battery and ECU then used a 12v power supply to supply power to pins 76 and 60 which ended up showing around 11v on the white and yellow wires.

Is this a ground issue? Can I ground the front O2 to the chassis? Should I send my ECU out to be tested and checked?

I’m really not sure what’s going on here.

EDIT: Does ECU case need to be grounded? It’s in my glovebox.

 

[chrisman287]

Car on I get 14.8v on red wire, 4mv on yellow wire and was trying to check white wire but my multimeter started bugging out. I think the battery is dying.

You must be logged in to view this image or video.

 

[99dsmer4g63]

I would not suggest grounding the o2 to the chassis.

I’ve ran with the ecu in the stock location without the mounting bolts before with no issues when troubleshooting.

-Daniel