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MOT fail on emmissions


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#1 billyb

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Posted 20 October 2008 - 02:49 PM

My 1994 Fiesta failed on emmisions (CO 1.26 HC 2.44).

The garage said the next thing to try was a new cat & lambda sensor.

Would this definitely fix the problem or is there anything else that could be causing the problem.

Also is it fairly straightforward to fit a new cat & sensor or are any special tools needed?



Many thanks

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#2 mintalkin

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Posted 20 October 2008 - 03:36 PM

the most commom fix would be a lambarda sensor and is straightforward to fit

#3 billyb

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Posted 20 October 2008 - 04:43 PM

the most commom fix would be a lambarda sensor and is straightforward to fit


Many thanks.

But does that mean that it could be just the sensor, or it could be just the cat.
And I wouldn't know which until each was replaced and re-tested?

#4 mintalkin

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Posted 20 October 2008 - 05:18 PM

i would go for the sensor first as its a lot cheaper than the cat

#5 Russ

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Posted 21 October 2008 - 07:29 PM

Chances are it's the sensor as they only last a certain number of years.


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