Any tips on replacing an O2 sensor? My MIL points to an O2 sensor malfunction and would prefer to learn to make the swap myself based on my first experience with my local Jeep dealership techs.

Any help would be greatly appreciated.

 

Just curious....what are you using to read the codes and what codes did you get? I only ask because I have had different codes come up depending on which method I used to read them Using the Accu Pro I had a code for an O2 sensor come up and using the key method I had a code for an evap leak.

 

Key Method. Error Code p0052.

The MIL came on after the dealer did warranty swap on a bad transmission. I assumed they didn't reset.

After doing a reset it came back on but key method shows no error code...

 

Well, assuming that you really need to change it, here's my experience when relocating the OE air (O2?) sensor captured in the OE intake tube, to my (then new) AirAid CAI tube (I cut mine out, but that's not an option for you):

BTW, don't know how to test it, but if wires loose or sensor bad... would test it before pulling it to be sure. If you haven't a new one in hand yet, the sensor is about 3/8 inch dia by an inch or more long and somewhat-to-VERY fragile... and about $40 or so a pop I think.

Make a good diagram about or mark the wires (or take a picture that shows the wire connection details , then disconnect the wires going to the sensor) ... I didn't disconnect the battery, but the AirAid instructs said to before disconnecting wires (works fine, so must be a safety thang). I wasn't (still not) sure what disco'ing the battery did/does to the computer AI learnings and if that would be a good thing or not (there is a code for "battery disconnected" in the code legend, but not sure why it would be tracked.

You'll probably have an easier time if you remove the intake tube and take it to your bark-o-lounger or work bench.

The sensor as you can see, is installed in a hole in the side of the air intake tube. What you don't see (unless your looking at the new one in hand) is the circular anchor that is part of the molded plastic of the sensor that is inside the tube... it's bigger 'round than the hole.

Squirt some WD-40 or something in the hole and very gently work the senor out... of course this assumes you care about the old sensor. I used hand sanitizer to lube the hole for my sensor install because I wanted something that lubed, but that would evaporate after.

You can work out the rest, no?