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MOT fail on emmissions

billyb
billyb
in Ford Fiesta Club

Featured Replies

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

  • Quote


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

  • Quote
    • Author
    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?

  • Quote

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

  • Quote

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

  • Quote

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