O2 Oxygen Sensor - Defender Source
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  #1  
Old February 20th, 2012, 04:02 PM
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aaron lam
1997 Alpine White D90 SW #2212
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O2 Oxygen Sensor

Hi,

So my 1997 D90 has been throwing a P0150 code... keeps coming back. The truck drives fine but the code comes back every 80-160 mi. Looked through the old threads here and thought I'd give changing the O2 sensors out as a start. Can someone help confirm these are going to work...

And P0150 is the passenger side front sensor on a 97, right? I was going to change both on the passenger side.

O2 sensor from RoversNorth:
http://www.roverparts.com/Parts/AMR6244.cfm

Socket Removal Tool:
http://www.amazon.com/TEKTON-4929-8-...9771274&sr=1-1

I read a thread about a PROM update... anyone think it's that? Would I need to take to a LR dealer for them to update the ECU?
http://www.defendersource.com/forum/...2&postcount=14

Thanks for everyone's help!
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  #2  
Old February 20th, 2012, 04:13 PM
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evilfij
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I would be inclinded to change both fronts as the rears don't do much other than check cat effeciency. You can get the O2s for about $100 if you shop around. If could be a bunch of other things too (bad wire, bad plug, stuck valves etc. etc. etc.) If you have 100k on your O2s, replacing them won't hurt.

I am not sure about the PROM update, but you would need to go to a dealer or an independent who has the scan tool to do that.
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  #3  
Old February 20th, 2012, 08:18 PM
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Tom Rowe
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Amazon has good prices.
w/AEL $53 shipped - http://www.amazon.com/NGK-25044-Oxyg.../dp/B001PNG622
w/o AEL - $97 shipped - http://www.amazon.com/NGK-25017-Oxyg.../dp/B000C5K4UY
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  #4  
Old February 21st, 2012, 04:46 PM
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aaron lam
1997 Alpine White D90 SW #2212
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I was looking at my existing O2 sensors and something was hacked by PO. Does anyone know why one of the downstream sensor's ground (coming out of the harness so it never makes it to the sensor) would be tied to the other downstream sensor's ground? Assuming it's ground b/c it's the black wire.
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