Is there a video on removing and replacing the Bank 1 O2 sensor in a 2001 XK8? Had the code read and it's P1646. I tried to find a video and all I could find were for the XJ8 3.0... NOT what I have.

Thanks!
Michael

 

It’s quite simple. P1646 is for the upper passenger side sensor if Left Hand Drive. Make sure you buy the Denso brand sensor and that it has the light grey connector. Rockauto has them for a reasonable price.

Part # LNE1684BB
https://www.rockauto.com/en/moreinfo...440755&jsn=443

1. Remove air intake duct.
2. From the exhaust manifold, look for the sensor and trace the wire to its plug, which resides between the throttle body and the firewall. There are 4 plugs for O2 sensors. Make sure you unplug the correct one.
3. Use a crows foot wrench or an O2 sensor socket and slip it on the sensor.
4. Unscrew it, inspect and discard the old sensor.
5. Apply copper anti-seize on the threads of the new sensor. Make sure not to get any anti-seize on the sensor itself.
6. Follow steps 1-4 in reverse.

I recommend buying the pair, driver and passenger side. Usually when one goes out, the other will also fail soon.

 

For peace of mind, check the electrical diagram for fuse and relay, just in case. A bunch of these brown body relays are the same, so feel free to swap them out to verify. It is more than likely to be the sensor, but at $50+, it is worth checking the circuit. It is a fairly easy job as long as the sensor is not stuck, access is not too bad and there is some room to apply leverage to the tool. As already pointed out, make sure you get the right type of sensor (wide band, upstream) and not the older lambda/downstream because they are electrically incompatible.

Once you are done, you may want to disconnect the battery to reset your fuel trims. Probably would not hurt to do a deep cleaning of the air flow/temp meter at the same time (use a dedicated spray).

"While you are there", check the condition of the octopus hose for leaks at the joint. It will likely be dry because the converter heats up so much, but check for residue.

Best of luck, keep us posted.

 

My son is my mechanic. I have the 2 upstream sensors coming in. Not sure he would have checked fuses first... good idea! Will post again when complete. Thanks!!!

 

Wasn't the fuses... was the drivers side O2 sensor, but he did replace both upstream sensors... and cleared the code and the check engine light went out... he cut the wires and removed them with a deep socket... had to go get a 22mm open end to finish though... however, while working on it, he found that the plastic thermostat housing was cracked and leaking... got an aluminum one coming... 2001 with 53k miles... a few minor issues popping up on the golf cart...