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keefola

p0420

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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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Just now, dezwez said:

that or cat on its way out

try the o2 sensor first?

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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..?

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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

 

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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

 

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