P0420 code

[Sctieco]

Hi I have this code p0420 on my ford focus 1.0 ecoboost on a 2012 is it an O2 lambda sensor or could it be the cat is end of it"s life nothing wrong with the car running great just the EML came on cheers

[Monks600]

Hi I have this code p0420 on my ford focus 1.0 ecoboost on a 2012 is it an O2 lambda sensor or could it be the cat is end of it"s life nothing wrong with the car running great just the EML came on cheers

It’s most likely the O2 sensor, I’d be very surprised if it was your catalytic converter. Swap the sensor out and see how you get along.


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[Sctieco]

Thanks for the reply I will give it a go took it to a mechanic he put a diagnostic on it with live data went through it all and switched it off if it comes back on I will try sensor as it is saying bank 1 thanks again for reply

[Monks600]

Thanks for the reply I will give it a go took it to a mechanic he put a diagnostic on it with live data went through it all and switched it off if it comes back on I will try sensor as it is saying bank 1 thanks again for reply

No worries, that’s good :) it wouldn’t surprise me if it’s a bit of sort or something on the sensor.


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