ssbowtie1

Curious if the rear O2 sensors are heated? My tuner recommended keeping them connected as sometimes you can still trip error codes. I'm trying to find the best place place them and my options are a bit limited if they generate heat when connected.

427V8BB

DaOtherOne

Keep them in so your emissions system looks complete but have the tuner disable them in the calibration.

ssbowtie1

What I meant is do the O2 sensors get hot when connected to the harness?

philadd

If I remember correctly, the front O2 sensors are heated, but the rears are not.

DaOtherOne

I agree.

Unreal

Zero reason to leave them in. If your tuner has 1/2 a brain he can set it so everything is good, no codes, and no issues.

ssbowtie1

This recommendation was given to me by Pat G, and I'm pretty sure he has a little more than half a brain. According to him, removing them works almost all of the time, but keeping them plugged in works all of the time with no exceptions.

romandian

iv had one of them strapped to the pipe on my blown c5 for several years now, wideband went in there.

jft69z

Front & rear sensors are both heated. At least that's what the GM O2 sensor schematics show, all 4 are heated.

sccaGT1racer

All of your 02 sensors are heated. Look at a wiring diagram.

Apocolipse

Yes.

ssbowtie1

Thank you all for the info. That's a bummer that they're heated so I'm going to just try to disconnect them and hopefully I won't have any tuning issues. I'd rather not have some heated sensors floating around the engine bay and it seems like they always burn up if routed to their post cat location.