Hey Everyone, I have a P0150 (Bank 2 Sensor 1) code and the mechanic says that it would be best to replace the O2 sensors in pairs? The total cost parts and labor would be $475 (ouch)..

My questions are:

1) Is this something a shadetree could handle?
2) Does anyone know what all is involved to replace them (what tools are needed and where they are located)
3) Is there a video available showing where they are and how to replace them?
4) Any recommendation on which O2 sensors to get?
5) Are all 4 of the O2 sensors the same or are the Sensor 1's different from the Sensor 2's?
6) When they say replace in pairs do they mean Bank 2 Sensor 1 and Bank 1 Sensor 1 (both pre-cat?)?



Thanks guys!

 

Take a look at this thread.
https://landroverforums.com/forum/di...sensors-76849/
It will help you on the cost. I have not gotten a code yet.

 

Thanks, I read the forum thread. I'm pretty sure I'm 25044.. So it looks like the sensor just plugs in on one end and use a 17MM O2 wrench on the other end?

And are both sensors the same upfront so I just buy 2 of the same?

Will the truck have to be on a lift or can this be done without a jack or lift?

 

All are the same front to back left to right. In my opinion the fronts are the worst in that the connector is behind the engine at the top of the trans tunnel. I had my hood off as I was working on other stuff so I just laid across the engine. You can get to them with out a jack but my need a little extra room to work. So jack it up and place it on stands.

 

OK. I will see how it goes, thanks!

 

O2 socket...
https://www.amazon.com/dp/B009VI9IMI...I26Q3N4W14GP59

O2 sensor for AEL (which yours is since it is a 1999)
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Best to replace in pairs meaning both fronts (upstream), or both rears (downstream). (as opposed to driver/passenger side)

 

OK thanks so much!

 

Replaced mine by myself, except for the driver side front (needed a mecahanic's help with a welding torch) which was stuck!

Since my truck has a 2" lift, I was able to work on them, but the front sensors were challenging to re-attach the electrical connector with. It was all done by feel while laying under the truck, and it took some fumbling to get them connected. Patience and good dexterity are your friends

I went with the NGK 25044 O2 sensors, and since you're doing the sensors, it might be wise to replace the Catalytic converters... I went with Magnaflows 99004HM at $100 a piece x 2 (so $200 for the cats)... and the mechanic charged me $100 to cut out the old ones, and install new ones.

In my experience... you may as well replace all of the oxygen sensors and the catalytic converters. Dealer would charge you a couple grand... this way you can do it for less than $600. It is less to worry about down the road, as once you replace one set of Oxygen sensors, the other ones aren't far behind, and you may as well replace the Cats

Best of luck!

 

I apologize for the thread jack but... do we need to coat the O2 sensors threads with an anti-seize compound during installation?
I only ask because while in the Air Force, it was common to coat turbine engine bolt threads with an anti-seize coatings and the ignitor connections with Milk of Magnesia (it really works!) due to the extremely high temps.
Now... I know the Disco's exhaust temps won't reach into 1000+ degrees like a turbine engine, but I wondered if any of these anti-seize options would help when reinstalling the 02 sensors.
Thanks in advance!

 

In the Discovery Workshop Manual, Section 17 - Emission Control, Pg 2, it states the following for refitting the O2 sensors:

"4. Coat the threads of the sensors with anti-seize
compound.

CAUTION: To ensure that the efficiency of
the sensor is not impaired, DO NOT allow
anti-seize compound to come into contact
with the sensor nose."

You are correct in your assumption sir