jacko
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| posted on 5/1/14 at 10:49 AM |
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Lambda senses help
Hi all
The wife's corsa B has been playing up for a some time the engine management light keeps coming on but if you rev the engine the light goes out
for a few days.
I have had it checked and the garage says its the lambda.
Can i remove this and clean it in some way or is it a new one wanted
How hard is it to remove and is special tools needed to do this job.
In all the years i have worked on cars i have never had to do this job
Jacko
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Proby
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| posted on 5/1/14 at 10:55 AM |
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Not sure you can clean it in any way.
I changed one on the wifes Lupo a few years ago. just unplugged it from the loom, put a ring spanner over it and screwed it out!! They can be a
bugger to remove if they are seized in, just make sure you use the correct size spanner in the first place as not to round the flats off. I
don't think its any different on any other car.
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Proby
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| posted on 5/1/14 at 10:56 AM |
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PS: I got the replacement from Euro Car Parts, seemed best price after haggling discount.
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Ben_Copeland
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| posted on 5/1/14 at 11:11 AM |
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Be careful replacing it. Vauxhall only like genuine GM lambda's
Ben
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Slimy38
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| posted on 5/1/14 at 11:15 AM |
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My car failed an MOT on emissions based on a lambda sensor, the garage did manage to clean it but I've no idea how. Unfortunately on removal
they actually broke the heater circuit so while I had great emissions, I had an engine light on!
The main problem with them is access, as Proby mentioned you need a good fitting ring spanner and a lot of clearance to get the leverage on what will
be a seized fixing. It can sometimes be worth taking it to a garage as they can get it up on ramps. It 'should' only be a ten minute job.
You ought to find out which sensor is at fault though, most cars have a pre cat sensor which deals with emissions and a post cat sensor that looks at
the efficiency of the convertor. Both can generate a fault light.
[Edited on 5/1/14 by Slimy38]
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big_wasa
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| posted on 5/1/14 at 11:15 AM |
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If you can get a spanner on it, it will be 22mm from memory or a deep socket with cable cut out is only around a fiver.
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imp paul
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| posted on 5/1/14 at 11:36 AM |
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Hi you could clean it with brake/clutch cleaner this some times works give it a go as they do get sutted up a lot so doesn't help
them work properly :-)
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britishtrident
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| posted on 5/1/14 at 12:46 PM |
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Vauxhall Corsa lambda Senors tend t to suffer from corrosion of the wiring and plug.
If the sensor itself is triggering a fault code then it is likely to be the sensor is responding too slowly and has failed the crossing point count
test.
Nearly all lambda sensors are made by a division of NGK or by Bosch but there are a lott of counterfeit ones around on ebay the most reliable
internet suppliers are gendan.co.UK
The hex size is indeed 22mm and often they can be very tight so a really good fit iscrequired.you can buy special slotted sockets for removing the
sensor I have found the crows foot style the most useful.
You can clean the threads in the manifold with a18mm (Ford Pinto) spark plugs thread chaser/repair tap.
[Edited on 5/1/14 by britishtrident]
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chrism
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| posted on 5/1/14 at 01:15 PM |
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You can get proper lamba sensor sockets with a cutout for the wire, they are usually the 6sided type of socket to help reduce the chance of rounding
off the nuts.
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A little hard work never killed anyone, but why take the risk!
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Proby
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| posted on 5/1/14 at 02:37 PM |
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As said by BT, 99.9% of Lambdas are made by either NGK or Bosch (including OEM), Euro Car Parts sold both options.
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