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billyb

MOT fail on emmissions

5 posts in this topic

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

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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?

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

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

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