Engine Light Shown

Ford Diagnostic says need a new Cata Converter. 
 

Is this common on the year of the vehicle after only 55,000 miles 

any tips

thanks 

8 hours ago, No8an said:

Engine Light Shown

Ford Diagnostic says need a new Cata Converter. 
 

Is this common on the year of the vehicle after only 55,000 miles 

any tips

thanks 

Try a bottle of Cataclean, you get it from Halfords. Add it to a quarter of a tank and go for a drive.

it should clean pre and post combustion, claiming to actively clean your catalytic converter amongst other parts.

There have been reports that it’s so good it can even cause the engine light to go out by itself!

The catalytic converter should last the life of the car, so It's either faulty or been damaged.
Have you run over anything which could have hit the exhaust?

Can you be more specific about the fault?  I'm wondering if it's the GPF rather than the cat itself.

3 hours ago, TomsFocus said:

Can you be more specific about the fault?  I'm wondering if it's the GPF rather than the cat itself.

I don't think 2018 Fiestas have GPFs, I think they were fitted to later models, possibly 2020 onwards.

56 minutes ago, Jim H said:

I don't think 2018 Fiestas have GPFs, 

There's a few threads on this, typically I can't find one at the mo.

I think if the emissions are shown in documentation such as V5C as 6.2, then it has GPF. My 2018 which is 6.0 doesn't have it, they seem to have slipped it in at the end of the run of the original wet belt ecoboost before the MHEV came in in early 2020, so probably late 2018/early 2019 on?

14 hours ago, Smartd00d said:

Try a bottle of Cataclean, you get it from Halfords. Add it to a quarter of a tank and go for a drive.

it should clean pre and post combustion, claiming to actively clean your catalytic converter amongst other parts.

There have been reports that it’s so good it can even cause the engine light to go out by itself!

Thank you 

I’ve have just tried this today and got advised to take on to the motor way and blast it out - fingers crossed as I have been quoted £500 🙁

On 9/11/2022 at 5:41 PM, No8an said:

Thank you 

I’ve have just tried this today and got advised to take on to the motor way and blast it out - fingers crossed as I have been quoted £500 🙁

Fingers crossed! Let us know how it goes.

For what it's worth, I had the same: 2018 1.0 140 STlineX ~ 80K miles. Enigne light on, OBD says catalyst. Ford garage agree, changed catalyst under warranty, all fine now. Still no idea if the catalyst was actually damaged/faulty or if it was just a sensor issue.

Please be slightly cautious at excepting the diagnosis. Only reason i say this is alot of techs when they see the code P0420 automatically just straight away say it needs a cat! Done!

The problem is these days with these little 3 pots shaking around all the time can cause minor cracks or gasket leaks in the exhaust. A lot techs dont realise that this code cannot only be triggered by excessive C0 but also being to low aswell.

An air leak in the exhaust or inlet can also cause this, vw and peugeot 3 pots in particular are renowned for hairline cracks in the catalyst which can be very easily welded saving £100's.

Ideally you should get an emissions test done to back up the diagnostic, if the C0 isnt zero in closed loop when warm chances are its the cat or a lazy lambda, but if its zero and your also showing high O2 then its probably a leak.