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Mk1 Focus Cat Sensor

JamieTYV
JamieTYV
in Ford Focus Club

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Hi everyone, 

Recently changed the cat and mid-box on my 2004 Mk1 Focus 1.6 LX. The connections to the sensor that's screwed into to exhaust just after the catalyst broke due to the ridiculous amount of force I had to apply to undo it.

Now I have EML illuminated. 

What is this sensor? Perhaps a part number if anyone can help with that? Also, where does it connect to? Is it relatively easy to access? 

Thanks in advance! 

  • Quote


    It's the post cat lambda sensor. Should be FINIS number: 1035595. Just double check it looks the same as the one you have (especially the wiring plug).

    It'll probably give you a P0420 fault code without the sensor plugged in (or running out of parameters).

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