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[addy]

Before I ordered my NTK O2 sensor, I contacted NTK Technical Department. I gave them the  VIN:, Date registered, Registration Number. Make, Model, Engine Size and Engine Code. 

The O2 that was supposed to fit my 2ltr, was the wrong one. When they checked against their files, I needed the earlier one, OTA7H-3C2 (Stock code 0420) Titanium Lambda even though my car is a 1995 first registered, so can only assume it was a ealier build? The Titania Lambda, which their webcat and other sites say fits mine, is OTA7L-3C4 (0431), which is not correct. So might be worth you contacting them, to check?

NGK Technical Email address:- technical@ngk.co.uk

NGK Webcat https://www.ngkpartfinder.co.uk/cars_commercial.php?type=LAMBDA%2520SENSORS

Hope this is of some help?

Addy

[Steveh]

Cheers addy glad you got yours sorted I may do the same as you take it to an mot place that also does repairs for a diagnosis  the one I used just do mot and not useful for advise(I'm going to have one last session to recheck everything for leaks and valve timing etc). I got a Lexmark sensor LOSO4/T18 as im low on funds. Wonder what the difference is between those NTK ones ?

[dave the builder]

Just use live data to check the lambda is switching about 200 - 800 mV   
also worth checking the EGR valve is not stuck slightly open ,i've seen that before

[Steveh]

Thanks iansoutham thats useful to know.

[Steveh]

Thanks Dave it was around that I think I'l put that on my list of checks to do  it was going closed loop and switching between lean/rich.

[Steveh]

Just use live data to check the lambda is switching about 200 - 800 mV   
also worth checking the EGR valve is not stuck slightly open ,i've seen that before

Were those figures for a Titania sensor? Ive learnt the different way they work changing resistance opposed to Zirconia which give out a voltage. Mines Titania.

[dave the builder]

Just use live data to check the lambda is switching about 200 - 800 mV   
also worth checking the EGR valve is not stuck slightly open ,i've seen that before

Were those figures for a Titania sensor? Ive learnt the different way they work changing resistance opposed to Zirconia which give out a voltage. Mines Titania.

giving out voltage ,so Zirconia, but look what values your "code reader" gives you.
 we can't talk about chinese clone software here at OOF ,against forum rules 

[Kevin Wood]

I'm pretty sure the 2.0 16V uses a titania sensor and from memory these give a voltage in live data of 0-5V. Can't remember which end of that range is rich and which is lean, though.

[Steveh]

Still not got MOT had to put project on hold for a bit resuming now just found an exhaust leak new cat downpipes where the 2 pipes go into 1 a large leak between just welded around tested with soapy water and compressed air and found o2 sensor leaking from where the wires go in have been sold duff pipes and sensor? at least I found something.

[Raeturbo]

Slight exhaust leak?

.                       Just saying......

[Enceladus]

Still not got MOT had to put project on hold for a bit resuming now just found an exhaust leak new cat downpipes where the 2 pipes go into 1 a large leak between just welded around tested with soapy water and compressed air and found o2 sensor leaking from where the wires go in have been sold duff pipes and sensor? at least I found something.

Are you meaning that the new NTK sensor has an air leak in it's barrel? If so that's very odd. NTK is a reputable company, part of NGK. Are you sure it's not leaking around the crush washer? Either because the crush washer is missing, the sensor is not properly tightened into the socket, or the sensor has been over tightened damaging the washer.

For the record, who supplied the downpipe and cat with the bad welding?

[tidla]

https://www.walkerexhaust.com/support/tech-tips/simple-diagnostic-testing.html

Helpful bit of info and simple test if youve a cheap infared temp reader.

[Steveh]

.[/quote]
Are you meaning that the new NTK sensor has an air leak in it's barrel? If so that's very odd. NTK is a reputable company, part of NGK. Are you sure it's not leaking around the crush washer? Either because the crush washer is missing, the sensor is not properly tightened into the socket, or the sensor has been over tightened damaging the washer.

For the record, who supplied the downpipe and cat with the bad welding?
[/quote]
Yes NTK sensor was leaking definitely from rubber grommet where wires go in. could i have knacked it with compressed air but didnt put huge amount of pressure in only sealed by hand and mole grips and a piece of tin over manifold connection. The cat was from All Car Parts (ACP) brand EEC . not got around to M.O.T. but now I dont need one? Thanks Covid 19. Its confusing because on 25 march government said "  All cars, vans and motorcycles which usually would require an MOT test will be exempted from needing a test from 30 March 2020" https://www.gov.uk/government/news/vehicle-owners-to-be-granted-mot-exemption-in-battle-against-coronavirus But now they say only if MOT ran out post 30th March .

[Steveh]

Oh sorry Enceladus it wasnt NTK it was a Lexmark sensor leaking.

[Steveh]

https://www.walkerexhaust.com/support/tech-tips/simple-diagnostic-testing.html

Helpful bit of info and simple test if youve a cheap infared temp reader.

Thanks useful info .