Check engine light after replacing all O2 sensors

[danzy55]

Ok all four are different so don't buy four of the one I linked to above... give me a minute and I'll provide the other part numbers...

I found them 23139, 23138, 23142, 23141

 

[danzy55]

just need warm weather up here and get this banged out!

 

[Jerry Bransford]

One last hint... there are special deep wall 7/8" sockets made for O2 sensors which have a slot cut into them for the sensor wiring. They are great for installing new sensors but they're often not strong enough to remove the old sensors which are typically seized in place. The slot cut into them lets them spread open and spin on the O2 sensor when you try to remove them. To remove the old sensors I'd get the engine good and hot first then cut the wiring off the old O2 sensors and use a normal deep-well 7/8" socket or box-end wrench. Then use one of the special slotted O2 sockets to install the new O2 sensors.

 

[danzy55]

One last hint... there are special deep wall 7/8" sockets made for O2 sensors which have a slot cut into them for the sensor wiring. They are great for installing new sensors but they're often not strong enough to remove the old sensors which are typically seized in place. The slot cut into them lets them spread open and spin on the O2 sensor when you try to remove them. To remove the old sensors I'd get the engine good and hot first then cut the wiring off the old O2 sensors and use a normal deep-well 7/8" socket or box-end wrench. Then use one of the special slotted O2 sockets to install the new O2 sensors.

Oh I'm sure they will be seized for sure, good advice! thanks

 

[Dwayne76]

I have a 2005 jeep unlimited I have replaced all the O2 sensors, the check engine light indicates an O2 sensor, my mechanic replaced all the O2 sensors had some other guys look at it , they were stumped he threw in the towel. My jeep has sat idol for about 6 months , it seems to be all pointing at the ecm, but I have also read that it could be the pre cats please any help would be greatly appreciated.

You should only use OEM parts when changing o2 sensors. NTK and Bosch sometimes throws CEL. I found this out from experience. I had to put AC Delco back on my Yukon to get codes to stop coming up

 

[pagrey]

You should only use OEM parts when changing o2 sensors. NTK and Bosch sometimes throws CEL. I found this out from experience. I had to put AC Delco back on my Yukon to get codes to stop coming up

Great advice, the stock TJ sensors are NTK so I think they are okay. Bosch probably isn't a good idea. This ain't no Chevy so Yukon take that for what it's worth.

 

[L J]

You should only use OEM parts when changing o2 sensors. NTK and Bosch sometimes throws CEL.

I would agree with the Bosch being a no-go (based on member feedback) but I've replaced my OEM O2s with NTKs without issue.

 

[Bowhunt4life]

What part numbers for the o2 sensors for a 2005 wrangler?