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p0420

keefola
keefola
in Ford Fiesta Club

Featured Replies

Code Read:

p0420 Catalyst System Efficiency Below Threshold Bank 1

 

Would people think this is an o2 sensor that needs replacing?

Fiesta 2003 Zetec 1.4

 

thanks

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    that or cat on its way out

  • Quote
    • Author
    Just now, dezwez said:

    that or cat on its way out

    try the o2 sensor first?

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     how many does it have 1 before and 1 after the cat

  • Quote
    • Author
    Just now, dezwez said:

     how many does it have 1 before and 1 after the cat

    I'm not too sure dezwez, not too good with cars.  Probably best to take it to mechanic..?

  • Quote
    Quote
    1 minute ago, keefola said:

    I'm not too sure dezwez, not too good with cars.  Probably best to take it to mechanic..?

    how many miles are on it

     

  • Quote

    I had same thing on my mates mk1 focus turn out to be the catalytic converter that was a high mileage

    car we got a aftermarket one and it was fine after that

     

  • Quote
    • Author
    10 minutes ago, dezwez said:

     

    97,000

  • Quote

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