Bank 1 O2 sensor - how to replace?
#11
Thanks for the location confirmations everyone. Wish I had the sensor side of the connector so I could splice the broken wires and see if the sensor is still working okay. Anybody know a source for just the connector or have an old one from a bad sensor laying around? Thanks again for the help.
PM me where to send it.
#12
The one I need is for the rear passenger side (after cat) so the grey connector. Not sure if the orange pre-cat connectors are identical except for color or not? If you have an old one that would fit that would be great. Let me know if it sounds like it would work and I'll get my info pm'd to you. Thanks!
#16
If the orange and grey are simply inverse of the other, then that would mean the plug from a pre-cat o2 sensor would be the same as the receptacle for a post-cat o2 sensor. If that's true then, worst case scenario, you buy a pre cat o2 sensor and rip off the plug.
#18
Dave - I'll PM you and see what we can arrange. Thanks!
#19
I found them on ebay out of Australia. I'm in a similar situation, my harness end from the computer melted due to the proximity to the exhaust manifold. At first I cut the connector off of the O2 harness and cut the melted connector coming from the engine harness and spliced them together. This solution is not working. I ordered the new connectors, lets hope they work because the dealer won't sell the connector, only the entire engine harness with all connectors SMH. I'm not sure what year your vehicle is, but here's the link New Connector Set for Land Rover Discovery Series 2 4 0L Oxygen Sensor O2 | eBay
#20
Old thread but I found it useful in replacing both upstream o2 sensors on my truck today so I thought I would throw in my two cents for anyone who might find it useful. I used an oxygen sensor tool which is really helpful, yes you could do it with a wrench, but it’s not worth it in my opinion. Here was my process:
.5) Spray them with liquid wrench the night before
1) Passenger side first, I removed the electrical connectors from the mounting point first, then disconnected the o2 sensor. Using the o2 sensor tool, a couple of extensions, and a breaker bar I was easily able to remove the sensor from the top. Installation was the reverse of removal.
2) Drivers side next, this one is tougher and best done from under the truck. I jacked my truck up a little just to give me some working room. On this side I removed the o2 sensor first and then while it was hanging down reached up and undid the electrical connector with my right hand while pulling down on the o2 sensor with my left hand to disconnect it, this is the toughest part of the whole thing, in my opinion. Installation is the reverse of removal- o2 sensor in first then reach up and plug in the connector- you have to do this by feel, orient the plug so the clasp is towards the back and push until you hear the magical click.
AB has a video that’s worth watching but I did not understand what he was going on about for removing the drivers side connector, but give it a watch anyway.
.5) Spray them with liquid wrench the night before
1) Passenger side first, I removed the electrical connectors from the mounting point first, then disconnected the o2 sensor. Using the o2 sensor tool, a couple of extensions, and a breaker bar I was easily able to remove the sensor from the top. Installation was the reverse of removal.
2) Drivers side next, this one is tougher and best done from under the truck. I jacked my truck up a little just to give me some working room. On this side I removed the o2 sensor first and then while it was hanging down reached up and undid the electrical connector with my right hand while pulling down on the o2 sensor with my left hand to disconnect it, this is the toughest part of the whole thing, in my opinion. Installation is the reverse of removal- o2 sensor in first then reach up and plug in the connector- you have to do this by feel, orient the plug so the clasp is towards the back and push until you hear the magical click.
AB has a video that’s worth watching but I did not understand what he was going on about for removing the drivers side connector, but give it a watch anyway.
Last edited by greisinb; 07-16-2020 at 09:36 PM.
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