Citroen C1, Peugeot 107, 108 & Toyota Aygo Owners Club. (Discount code for CityBugStore: C1OC)
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Pre Cat Lambda Sensor Removal
http://www.c1oc.co.uk/forum/viewtopic.php?f=6&t=12556
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Author:  Entropyuk [ Tue May 14, 2019 9:36 pm ]
Post subject:  Pre Cat Lambda Sensor Removal

Hi there, I just bought my first C1. Its an MOT failure and has a "Exhaust lambda reading after 2nd fast idle outside specified limits" issue. It is a really low milage car 38K,so wanted to clean the pre cat sensor as its probably caked in carbon. However I cannot remove the connector as its clipped into a flange and I cannot push in the lower clip down due to sausage fingers. Any advice on how I can release the connector?

Author:  hello [ Tue May 14, 2019 10:41 pm ]
Post subject:  Re: Pre Cat Lambda Sensor Removal

a heat gun is what i use or maybe you can use a hairdrier
these lambdas either work or they dont,you cant clean them,you really need live data to see if its working or not

Author:  Roc [ Tue May 14, 2019 10:53 pm ]
Post subject:  Re: Pre Cat Lambda Sensor Removal

Just replace it.

Find someone with smaller hands? ;-)

Author:  bugsb [ Wed May 15, 2019 7:40 am ]
Post subject:  Re: Pre Cat Lambda Sensor Removal

agree been there before just replace and forget , then take it for a long Italian tune up with some fuel additive like redex added to the fuel then back for the mot

Author:  Entropyuk [ Wed May 15, 2019 11:11 am ]
Post subject:  Re: Pre Cat Lambda Sensor Removal

With this fault from the MOT, what sensors should I replace? The pre CAT, post CAT or both?

As for removal of connector, I may engage my daughter in some forced labour as she has small hands. Barring that I think some long nosed pliers may do the trick.

Author:  Roc [ Wed May 15, 2019 11:22 am ]
Post subject:  Re: Pre Cat Lambda Sensor Removal

https://citybugstore.co.uk/search.html? ... a=category

All you need on this page, with proven units.

Replace both if you have the funds, but the pre cat is the most prone to failure.

Author:  Entropyuk [ Wed May 15, 2019 9:45 pm ]
Post subject:  Re: Pre Cat Lambda Sensor Removal

Thanks guys, I have ordered a replacement so will replace and put the car in for the MOT.

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