Rover Resources Center
Oxygen Sensor Service On Range Rover P38, D90 Or Discovery I
Watch Doug, our Land Rover Master Technician, explain the process involved in performing the oxygen sensor service for a 1995-1998 Range Rover 4.0 or 4.6 (P38) with GEMS Engine. Using money-saving kits # AMR6244SKA or ERR1834SKA (depending on VIN #), with 2 oxygen sensors each for front (upstream) and rear (downstream) installation, it is recommended that the O2 sensors be replaced every 90,000 miles.
Kit #: AMR6244SKA / ERR1834SKA Installing the Oxygen Sensor Kit on Range Rover 4.0 or 4.6 (P38), 1995-1998, 8-Cylinder GEMS Gasoline, North American Specifications, For vehicles with VIN up to 350101 (1995-1997): ERR1834SKA; For vehicles with VIN from 350102 (1997-On): AMR6244SKA Hi I'm Doug, your tech support representative for Atlantic British and in this video we're going to talk about the repair and maintenance academy kit that we ave for the replacement of your O 2 sensors on your 96 to 99 P38 with a GEMS engine. We have the kit. As you know you can go online and you can access and download this sheet. And what this does is give you a list of maintenance items are recommended by Land Rover in the maintenance schedule sheet for that vehicle. In this case we are going to discuss the kit for the O 2 sensors. They're recommending replacing the O 2 sensors every 90,000 miles. Over a period of time they do get coated. They get oil. They get road debris on them. And that will affect their performance which directly affects engine performance and fuel economy. What we have here is 2 different sets. And the reason for that is there is what they call a VIN split, or a change of design during that model. And what we have here is which stocks they - I'm going to pull this up so you can read that - these are the AMR6244SKA. These are for the P38 Range Rovers from vehicle number 350102. And that will be the last 6 digits of your VIN number that is on your windshield and on your door panel. The other kit is ERR1834SKA and those are for vehicles that were built up to 350101. So keep that in mind and before you order this kit you will need to know the last 6 digits of your vehicle I D number. And you can get that directly from the windshield on the driver's side or on the door jam on the driver side. Both will have your VIN number posted. Or even your vehicle registration will have it. So, there isn't much of a difference between them, but you will see that on the early version you have a black 4 pin connector. They use the same O 2 sensors. And on the new version, or the A's, uses a grey connector. That will help you discern whether or not you have either or. Again, I'll just reiterate that changing the O 2 sensors every 90,000 miles can make a huge difference in the performance of your engine. They do directly affect the fuel mixture, so they do directly affect your fuel economy. So now we're going to show you where the location of those O 2 sensors are and show you how to take them off. Here we are underneath a 99 P38 GEMS engine and we're going to show you the locations of the O 2 sensors. On these they're fairly open, they're very easy to get at. This is going to be the upstream O 2 sensor, and we're looking at the passenger side of the vehicle, or right side if you were in the vehicle facing forward. This is your downstream right here. Following your wiring will take you right to your connectors, which are relatively easy to access. Generally the 2 for the downstream are going to be right up on the backside of the transmission transfer case connection. And with these you are just simply going to use a five eighths wrench. And I usually start with a flair wrench because that creates less flex on the line. They become a little bit easier to disconnect. These are fairly clean, so you can see this one just broke loose. So you break it loose with a flair wrench, and then you can go to an open end. And you can even do it while it's still connected. You can spin these out. And then what you're going to do, once you have it laid down you can reach right up, disconnect it nothing more than just squeeze the tab and release it. And you're going to do just the opposite putting it back in. And once you set it in place, again, you use your open end to set it, and then you go back to your flair wrench. And you just need to give it a snug. You don't need to over torque it because you definitely don't want to strip the threads out on that and then that becomes a big job. That's in nice and snug. That's not going anywhere. There's the rear. Now you'll notice on some of these, right here. You'll see the heat shield actually touching the wiring. You want to put that heat shield back up in place because eventually what it will do is rub through those wires and then you're going to end up with an O 2 fault code. So always keep that in mind. Once you get these out you can see what's missing is a little washer and nut that belongs right there that will pull the heat shield off of the O 2 sensor. So keep that in mind you want to make sure there's nothing is rubbing on the wiring. Now just to show you where they are on the driver's side. Now on these the drive shaft seems like it might be in the way but you can still get a wrench up under the upstream. You're going to remove it the same way. Follow the wiring. It will take you to the connector. Squeeze the tab and release. The rear, actually relatively easy to get at. And what you may do when you go to take these off and sometimes you're going to run into something that's a little on the snug side, you can take a hammer and you can tap on the end of the wrench and slowly work it around. You'll feel if it's going to loosen up or not. Once you break it loose, I found sometimes you are going to get a lot of carbon build up, on the bottom side or exposed areas of the threads that are inside the cap. Just simply try to loosen it a half a turn or a quarter of a turn and then come back, and then go forward again. And it's a little tedious, but you'll do less damage to the threads which will make installing the new ones that much easier. And that's pretty much it for changing the O 2 sensors. Again, every 90,000 miles. You want to keep your vehicle running well. Keep your fuel economy down. And when you're ready to change them over you can give a call any of our knowledgeable salesmen - 1-800-533-2210.
Applies To These Models:
Discovery I | '94-'99
Range Rover 4.0 (P38) | '95-'02
Range Rover 4.6 (P38) | '95-'02
Defender 90 | '94-'97
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