O2 Oxygen Sensor: Code 44 - Defender Source
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  #1  
Old April 8th, 2013, 11:46 AM
jijalicious
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Jiman Khosravan
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Question O2 Oxygen Sensor: Code 44

Happy Monday...

Or another typical Monday for me with a Fault thrown...

94 D90 Manual w R380 3.9L....

Lambda 44 ie Oxygen Sensor Fault

I've gone ahead and reset it to see if it comes back per the other 6 or so threads I read on here... but the fact that I'm getting poorer mileage the past 3-6 months.. seems legit failure.

One thing I couldn't find is the location of these 2 sensors in order to clean them, reconnect them and then swap them to see if 45 shows up..so can't do this since don't know where they are screwed in.

Does anyone have a picture (s) of location or could you snap one and text me? Thanks...

Also, if I were to buy 2...

Some say: STANDARD MOTOR PRODUCTS Part # SG130 from Rock auto ~$30
Some say: Amazon
M/T - NTK 25016 - $90
Rover north Proline $137
Rover North Original no price listed.

What would be the best option? Or is the right option not even listed here?

Thanks for the info gents.

~Jiman
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  #2  
Old April 8th, 2013, 01:33 PM
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Jason England
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if you crawl underneath they are in the top side of y-pipe on the exhaust.
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  #3  
Old April 8th, 2013, 02:21 PM
MonLand
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If I remember correctly the only manufacturer you can use is NTK based on the technology used.

$30 probably means that you will need to splice the wires and re-use the current plug (which is fine if you know what you are doing).
If you go generic, make sure you get a 3-wire sensor. For some reasons, it looks like generic=any kind of O2 sensors on many part sites....
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  #4  
Old April 8th, 2013, 04:34 PM
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Jiman Khosravan
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engine threw fault... so code came back...(haven't checked led yet thought but it's the same thing)

I'll go and swap them so see if I get 45...

anyone against getting the proline?

And I guessing best to repalce both of them?
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  #5  
Old April 8th, 2013, 04:38 PM
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Proline is as good as anything else...and yes replace both, seems to be the way.
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  #6  
Old April 8th, 2013, 04:39 PM
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Just get the NGK NTK that I'm assuming you saw in my old thread, as you mentioned Amazon. I haven't used Proline, but I hate change.
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  #7  
Old April 10th, 2013, 02:39 PM
DonFromWhitby
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Don Andrews
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I went down this path a few years ago with replacing O2 sensors all the time... went through 3 sets in two years with constant errors.

After diagnosing and trying to figure it out, I suddenly realized that when I looked at the sensors after replacing them, all the ones on the right side were covered in soot / burned looking.

The fault code was that the sensor was at fault... The real cause was actually that the TPS sensor was bad, putting WAY too much fuel in the right bank and burning out the O2 sensors...


Try a TPS switch and see if that fixes it.



/Don




Quote:
Originally Posted by jijalicious View Post
Happy Monday...

Or another typical Monday for me with a Fault thrown...

94 D90 Manual w R380 3.9L....

Lambda 44 ie Oxygen Sensor Fault

I've gone ahead and reset it to see if it comes back per the other 6 or so threads I read on here... but the fact that I'm getting poorer mileage the past 3-6 months.. seems legit failure.

One thing I couldn't find is the location of these 2 sensors in order to clean them, reconnect them and then swap them to see if 45 shows up..so can't do this since don't know where they are screwed in.

Does anyone have a picture (s) of location or could you snap one and text me? Thanks...

Also, if I were to buy 2...

Some say: STANDARD MOTOR PRODUCTS Part # SG130 from Rock auto ~$30
Some say: Amazon
M/T - NTK 25016 - $90
Rover north Proline $137
Rover North Original no price listed.

What would be the best option? Or is the right option not even listed here?

Thanks for the info gents.

~Jiman
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  #8  
Old April 10th, 2013, 08:38 PM
jijalicious
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Jiman Khosravan
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Thanks Don...

The truck has about 210K on her.. 40K of it is mine.. and after finding the sensors (thanks @leastonce)
(although the right side.. will be fun locating where it connects as i see a cable running up from the sensor and don't see where it ends)

Feel like changing the sensors should happen since I haven't seen any doc of the previous owner ever changing them (yup, i got lucky and have all the docs from all his services he did on the truck)

If my mpgs doesn't increase, I'll take a look at the tps...

NTK NGK ordered, Thanks @rijosho

~Ji
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  #9  
Old April 22nd, 2013, 03:40 PM
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Jiman Khosravan
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So I got the M/T - NTK 25016 - $90

But the connector is square.. instead of circular... and 4 wires.. instead of 3....

Did I completely screw myself over??

Was the: A/T - NTK 25044 - $60 the correct one?

I have a D90 '94 Manual trans.
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  #10  
Old April 22nd, 2013, 04:41 PM
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NGK 25016 NTK/NGK worked on my 1995 manual trans - it should work on yours as well. Do you have an aftermarket y-pipe or anything like that? O2 sensors for the NAS 1993-1995 are pre-cat readings only.
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  #11  
Old April 22nd, 2013, 04:59 PM
MonLand
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Quote:
Originally Posted by jijalicious View Post
But the connector is square.. instead of circular... and 4 wires.. instead of 3....
4 wires is definitely for the V8 4.0L (96+) engine. Your '95 definitely wants/needs the 3 wire version.

I can't comment on part #.
As I read some time ago, the difference between 4 and 3 wires was that the heating element of the sensor and the actual 02 sensors are sharing the ground on the 3-wire version and not on the 4-wire. So technically, since your ECU does not/will not detect when the heating element dies, you should be able to convert the 4- into a 3-wire setup. But... Having NOT done it myself, I can't tell for sure neither can I advise it!

This looks right for the '94/'95: http://www.summitracing.com/parts/ngk-25016

This does not look right: http://www.summitracing.com/parts/ngk-25044 (Looks more of the Disco 2 sensor, does not look like a 96 D1 sensor, the interior of the plug should be yellow/no fence [I assume the '97 D90 share the same sensor as the '96 D1])

This is what I have on my D1 ('96 OBD-2 and 4 of those babies...): http://www.summitracing.com/parts/ng...ake/land-rover

I would call the seller and ask to check what they sent you.
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  #12  
Old April 22nd, 2013, 05:13 PM
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Yeah, it sounds like you ordered NGK 25016 but they may have sent you NGK 25044 or something else that is incorrect.
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  #13  
Old April 22nd, 2013, 07:28 PM
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Jiman Khosravan
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After looking at the summitracing links and pics (thanks MonLand).... you guys are correct.. they sent me the wrong part in the correct box.. Good stuff!

Now I gotta look up amazon return policy.....EGGCELENT.
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  #14  
Old May 14th, 2013, 06:46 AM
jijalicious
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Jiman Khosravan
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Morning,

So got the right sensors now and started looking underneath... And saw that heat shield on one of the sides..

That thing is so old and dry, I know the moment I try to move it, it will crumble...

I tried searching for heat shield but the hits I get are for dynamat and how to keep the heat from coming into the cab from the engine compartment.

Anyone know what it's called and where can I get one? And what is its main function? To keep the passenger cool or too keep its own parts from melting below since its so close to the exhaust?

Thanks
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  #15  
Old May 14th, 2013, 07:42 AM
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Heat shield is for the starter. Are you gonna be at Happy Hour on Thursday? We can take a look then.
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  #16  
Old July 3rd, 2013, 04:28 PM
jijalicious
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Jiman Khosravan
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Bill, sorry for being mia and missing the HHs... been and out of town... will try to get to the next one


I finally changed out the sensors... error 44 is gone.. woo hoo....

Also, if anyone has the mallory distributor... i highly... HIGHLY recommend getting:

Mallory 30451 Promaster E Series Ignition Coils

I no longer have sputter.. when the car got hot... always had issues off the line... no.. zilch...


I am happppppppppppppppppppppppppy
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