BigDave
53 posts
Joined: 14/01/2007 20:31:55
Location: Penge United Kingdom (Excluding channel Islands)
Lambda Sensor
Alrite Lads
Has anyone changed a lambda (Oxygen) Sensor before. Mine has just packed up and im bellowing out black smoke and my spark plugs are as black as the ace of spades.
I want to change it myself and am resonably capable under the bonnet, but my question is - Where abouts is it? Is it accessable from underneath the car? I was told it would be on the down pipe before the cat but i thought it was right up on the manifold.
If anyone has changed one and can tell me what they had to remove it would be very very helpful.
Oh iv got a 1995 Mayfair 1275 SPI
Cheers
Dave
Posted: Mar 10, 2008 06:48 PM
Luke6040
210 posts
Joined: 17/11/2005 17:00:38
Location: Wolverhampton United Kingdom (Excluding channel Islands)
hi just had look in my haynes for ya, and it say you gotta get the inlet manifold off to do it (you might not have 2 tbh lol) so im guessing its on the exhaust manifold. When you done it might be worth givin it some welly in 3rd to clear the carbon Luke
Posted: Mar 10, 2008 07:08 PM
Yeah i looked in mine and it sounds so over the top and isnt explained very well at all so wanted to see if anyone had done it themselves and could maybe explain it to me!
Really i want to be able to get to it from under the car because it would be so much quicker if its on the manifold.
Posted: Mar 10, 2008 07:52 PM
Andy500
6 posts
Joined: 10/02/2007 20:45:26
Location: Congleton United Kingdom (Excluding channel Islands)
I dont know if its in the same position as the MPI but if it is then its right up nearer the top of the exhaust mainifold and would probably only be accesible from above the car.
They can be changed on an MPI without removing the inlet but access is seriously restricted.
You may find that you need to rempve the manifold anyway as once theyve been in a few years they can be awfully tight to remove and a right pain in the ar*e, especially when your arched iver the top of an engine.
Buy a lambda'oxygen sensor socket if you havent got one already as they make the job a little easier.
Posted: Mar 10, 2008 07:58 PM
John
1948 posts
Joined: 28/05/2006 16:49:46
Location: cambridge United Kingdom (Excluding channel Islands)
it should just be on down pipe you can normally fit gineric ones as long as have right number of pins, 1,2,3 or 4 some are heated so work alot soomer. they are only ment to last around 40,000 miles. access you will have to have alook and see what tools you have shouldnt be too bad.
Posted: Mar 11, 2008 12:12 AM
pickme
672 posts
Joined: 08/09/2004 23:10:14
Location: Chippenham United Kingdom (Excluding channel Islands)
Mine was a four wire type but was an absolute witch to remove.
The hard part is that you need to remove it with a socket and wrench to have a hope in hell of shifting it but the wires in the way mean that's not easy. You can buy special sockets with a slot in to allow for the wires but they are pricey.
I cut the wires off the old one and used a long reach socket to remove it. Then cleaned up the threads and used just the socket gripped by a mole wrench with the wire poking out the socket where the normal 1/2" ratchet plugs in and tightened it up that way.
I actually made no difference to the running problems I was having at the time but at leat that was one less unknown.
Posted: Mar 11, 2008 12:22 PM
Darren
8 posts
Joined: 12/10/2005 22:43:37
Location: Lewes United Kingdom (Excluding channel Islands)
Lambda Sensor Plug
Does anyone know please what the thread is for the Lambda sensor hole in the RC40 exhaust manifold. I need to plug it and don't really want to buy the sensor to do it!
Thanks
Posted: Mar 17, 2010 01:15 PM
Abominator
26 posts
Joined: 14/08/2008 22:14:34
Location: Wishaw United Kingdom (Excluding channel Islands)
Lambda sensor issues...?
Lately my 96 Auto SPI has had wildly varying power when idling and revving, sometimes shooting up as high as 3000 revs when in neutral, and has even cut out once or twice when crawling home from work in heavy traffic because the revs are so low.
Does this sound like a broken lambda sensor?
That's what my Googling suggests to me!
I think I'm overdue a trip to a proper mini garage because the local place I usually use aren't really on-the-ball with this sort of thing :(
Posted: Aug 11, 2010 08:49 AM
Chris Savory
1 posts
Joined: 27/05/2008 21:54:41
Location: Kingslynn United Kingdom (Excluding channel Islands)
New lambda bought from here stuck at 0.8 volts limp mode
As the title says. Had a lazy old lambda sensor so replace with a new sensor bought from here so correct plug figment etc. Using my Sykes Pickavant tool everything is working how it should and the car runs absolutely fine. But I am getting a stuck limp mode reading of just 0.8 volts from my lambda according to my Skykes Pickavant tool.
no air leaks, spark plugs are correct colour, air temp reading when warm is 22c, coolant temp sensor when warm is 89c, map sensor at idle 34kpa, throttle position sensor volts ok, 02 heater relay working
I need ideas cause I am all out.... The wiring is all ok.
If I put a multimeter on the green wire I getting a reading all the time of 1.5 and if I put a multimeter on grey wire I get fluctuating 0.6-0.8. But it's very vague as I am using standard multimeter not measuring MV
i also fitted a previous new lambda which did the same which was returned as I thought I might be faulty but as this one is doing it to I don't think it's that.
Posted: Feb 08, 2016 06:02 PM
Edward Christie
4 posts
Joined: 07/09/2017 15:56:58
Location: London United Kingdom (Excluding channel Islands)
ROVER MINI 1.3 COOPER (1991-2000) 4 WIRE FRONT LAMBDA OXYGEN SENSOR O2 EXHAUST
Hello does anyone know of a short cut to replacing this sensor without having to remove the inlet manifold etc. Many thanks
Posted: Feb 13, 2018 06:07 PM
Stuart Proud
Joined: 10/02/2016 18:18:52
Location: Vantaa Finland
Hi everyone - hoping someone can help me. I have a 93 1.3SPi cooper and I am having issues with it running poorly and rich. I am living in Finland and have had the car at one of the only Rover specialist places with diagnostics in Finland. The Lambada was changed to a Bosch Lambada and it seems to work when the car is first started and then once warmed it seems to stop working again - this is what the diagnostic tells. The specialist here tells me a genuine Rover Lambada should solve the issue. I am a little sceptical as I have been told the Bosch is the best sensor. Does anyone have an ideas? Any comments? Already it has cost me a lot having this fitted without any real improvements.... Thanks!
Posted: May 07, 2020 09:32 AM
Jake Holmes
172 posts
Joined: 14/02/2009 21:39:11
Location: Walton on Thames United Kingdom (Excluding channel Islands)
Re
Just a thought but maybe the lambda/o2 sensor is faulty?
Posted: Mar 03, 2011 10:19 AM
rozzer1275
70 posts
Joined: 20/08/2006 15:25:05
Location: harpenden United Kingdom (Excluding channel Islands)
Bloody hell.... my mpi failed MOT on emissions again! And this time it aint the throttlebody idle switch...
The lambda probe relay controls the lambda probe heater, which gets the lambda probe to operating tempreture quicker from starting, the heater will turn off when hot enough, the ECU ignores any lambda probe readings until it is at tempreature, a lambda probe will work without a heater as long as it is hot enough (like several minutes of driving)
Do you have means to check Co2?
Posted: Jul 28, 2008 12:13 PM
Batmini
168 posts
Joined: 11/03/2007 10:47:54
Location: Kidderminster United Kingdom (Excluding channel Islands)
1994 spi
Sounds to me like a lambda sensor problem. ECU not registering fuel/air mix properly
Posted: Mar 04, 2010 07:42 PM
C. Barron
332 posts
Joined: 04/05/2006 21:28:31
Location: Mid Calder United Kingdom (Excluding channel Islands)
Just Fitten LCB to 99 MPi, Bad running query
Does the MPI have a lambda sensor in the exhaust manifold, or is it further back in the system ?....or does it not have closed loop engine management at all ?
Posted: Jul 06, 2006 09:39 PM
TuukkaS
30 posts
Joined: 27/04/2007 13:02:56
Location: TURKU Finland
Hey mate!
Didnt even think about that.. I checked em for the gap and if there was any deposits but thought they looked to be in ok condition. I might change em anyways to be sure!
Anyways managed to rule out some things tonight. I beeped thru the wiring harness to the ecu and made sure there was a good connection from the lambda and also from the map sensor... I also checked the lambda voltage with a multimeter with the car running and lambda values seemed sensible... varying beetween 0.1 and 0.9 volts. I also cleaned all the multiplug contacts so thats sorted aswell.
So ECU should get the lambda value and the sensor seems to be working aswell. I unplugged the batteryand left it unplugged so the ECU would reset (if it even does) just to make it realize theres a new sensor plugged in.
PS. There was a small deposit of greenish crap on one of the Ecu Multiplug pins.. If I read the MEMS info correctly (found a spec sheet on the net) the pin was for Throttle Stepper Phase 1 or something.. might that affect something incase the contact was bad?
-T-
Posted: Jul 21, 2008 07:39 PM
taffy1967
1783 posts
Joined: 27/09/2006 18:58:07
Location: Rhondda-Cynon-Taff United Kingdom (Excluding channel Islands)
Re:
Yes any good suitable LCB should and Maniflow are one of the best. Just so long as you tell them what Mini model you own and the fact you need one with the lambda sensor hole, then you should be fine.
Posted: Jun 16, 2009 01:28 AM
mark russell
2 posts
Joined: 12/06/2009 14:34:36
Location: west lothian United Kingdom (Excluding channel Islands)
help advice please emissions
can any one inform me where to adjust fuel mixture on my 1995 spi before i try changing lambda sensor and cat.just a process of elimination for me.also would the fact using a injector of a metro effect emissions?thanks for any help advice in advance. mark
Posted: Jun 18, 2009 02:34 PM
kjw911
36 posts
Joined: 10/04/2005 18:45:44
Location: BROADSTAIRS United Kingdom (Excluding channel Islands)
MPI Failed MOT on emmissions again
Plug leads sorted, exhaust fully seal with no leaks, injector cleaner added to fuel. Ran it for 30 minutes up the motorway and it failed again on Lambda 1.2 Anyone got any ideas to solve this?
Posted: May 20, 2005 08:14 PM
beno
38 posts
Joined: 20/03/2006 23:00:31
Location: horncastle United Kingdom (Excluding channel Islands)
spi non starting
have susd the problem but now the car runs lumpy and sounds like is on choke all the time- he plugs are also black as the night, my thoughts are lambda sensor has not liked being disturbed and has now failed? any ideas?
Posted: May 07, 2007 02:38 PM