Lambda (oxygen) sensor retrofit

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Originally Posted by PhilipA

BTW, AFAIR GEMS ECUs are coded to the particular VIN as a theft prevention measure and also must agree with the speedo. This again will require at least a dealer coding machine. So if you buy one , you will need to spend extra money. I am under the impression that it is very difficult to have a second hand GEMS ECU work in a different car.

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Sorry, Philip. I was wrong.

From a training document I have:

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It must be remembered that the New Range Rover features Robust Immobilisation. The GEMS ECM learns an immobilisation code, supplied by the BeCM, each time the engine is started. If the GEMS ECM doesn't recognise the code received then it will immobilise the engine, by disabling the injectors. This means that swapping GEMS ECM's (or BeCM's) from one vehicle to another will invoke immobilisation. Therefore when trying to diagnose a fault do not substitute an ECM from another vehicle.

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I can now tell you that after fitting new lambda sensors ($110 each via UK eBay) the standard ECU is not recognizing them all by itself. Might need testbook to enable them.

After swapping the ECU chipset to the Tornado chipset the O2 sensors were picked up straight away and fuel system is now running in 'closed loop' mode

Have you fitted the wide band or narrow band sensors? Heated or unheated?

er I'm not sure - here's the link to what I bought RANGE ROVER P38 OXYGEN SENSOR 1995>1997 - ERR1834 - eBay, Range Rover, Car Parts, Vehicle Parts Accessories. (end time 23-Feb-10 01:57:12 AEDST)

Its the early type ones, 4 wires and a square plug. They work and that's the main thing :)

To anyone wanting some Oxygen sensors,

I have a brand new pair sitting around doing nothing as I inadvertantly (under very poor advice) purchased them for my sensor-less 1995 P38.

I can't be buggered mucking around with e-bay and can probably tell you what I paid for them (and from who) after digging them out from storage. I would probably be happy with whatever the pom's on e-bay are asking (save yourself the freight charges!) even though I think they cost me more like what Ritters are after.

Anyways, if anyone wants them, let me know and PM me a price you would be happy to pay.

Dave & the pretty pig

So is the car running better, how much fuel are you using?

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Originally Posted by DT-P38

To anyone wanting some Oxygen sensors,

I have a brand new pair sitting around doing nothing as I inadvertantly (under very poor advice) purchased them for my sensor-less 1995 P38.

I can't be buggered mucking around with e-bay and can probably tell you what I paid for them (and from who) after digging them out from storage. I would probably be happy with whatever the pom's on e-bay are asking (save yourself the freight charges!) even though I think they cost me more like what Ritters are after.

Anyways, if anyone wants them, let me know and PM me a price you would be happy to pay.

Dave & the pretty pig

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I'd be interested if I knew they'd work with my ECU.

Hey P38arover,

Honestly, I would not even know how to tell you if they would work...

I guess if I was a much smarter cookie, I would seriously investigate and consider what they could do for my "pretty pig" too! It makes sense that the brain continuously knowing and regulating how much oxygen the heart needs would be VERY good for overall performance... but I am no car doctor, :eek: and from what I've been reading here, both the modifications for fitting and technology required to activate it all are out of my reach anyway.

Would having them up there help you work it out? I could express bag them to you and if there good you can make me an offer on the price... no doubt I can trust a "super moderator":angel:, and at the end of the day I think its only about 6 bucks for a bag!

Let me know... Dave

Rave says (Fuel V8, section 19, page 54) that for post 99 vehicles, pre-cat sensor connectors are orange and post cat sensor connectors are grey.

I just bought two of these (Auto Parts Giant - Land Rover ARBL960903) from the US and installed them, but they have the grey connectors, and the ones I removed which I assume are OEM have orange plugs. The reason I checked RAVE is because these new sensors are always showing 0v on ODBII scanner (Android 'torque' app). My fuel system is always in 'open loop - low temp' though, regardless of the engine temp (which sits at 92c once warm).

So have I bought the wrong ones?
Dave, what model number/colour are yours?

hey guys, one of my sensors is buggered on my 99 model, i just bought a replacement (grey plug) is that the right one, and does that explain y my car would be pinging??? im yet to fit it... also when i fit it, do i have to clear the fault off the computer or would it recognise that its a new one?? im also always runng 98 octane.
thanks Sam... sorry if off topic