FORD FOCUS ENGINE LIGHT CODE P0420 Catalyst System Efficiency

FORD FOCUS ENGINE LIGHT CODE P0420 Catalyst System Efficiency
If you have Ford Focus and have engine light on and code P0420 we will explain what most likely causes code P0420 on Ford Focus MK3. Code P0420 Catalyst System Efficiency Below Threshold Bank 1. We will share the most common reason for code P0420 based on our experience at the shop. In this video we will demonstrate what triggered code P0420 on a 2013 Ford Focus but the procedure should apply to the whole first generation Ford Focus.
This video might be helpful on:
2012 2013 2014 2015 2016 2017 2018 2019 Ford Focus Engine Light Code P0420 Catalyst System Efficiency Below Threshold Bank 1
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[@khoale1826]

Every of your video on KZbin really helpful. Thank you.

[@NAS7SCARECROW777]

Where do I get that 02 sensor offset to raise my sensor height?

[@David-xo7lg]

I have this error code on my 2014 ford focus ecoboost 1.0. Would this cause to use more fuel?

[@BillyWalters-z2s]

Does the sensor work on the 1.0 focus

[@robbiemendenhall9381]

Where is the link for that oxygen sensor extender? The illegal one that you were talking about? It's not in the links below?

[@topher6_9]

Thanks for the video! I have the same code and to save some money I plan on replacing the sensors first because mine comes and goes. If that doesn’t work I’ll do the catalytic converter next.

[@YethandYeth]

Did it fix the issue ? Mine still won’t go away and I have done everything but the fuel injectors and the cat

[@topher6_9]

@@YethandYeth not sure why I was getting that code. My problem was with the TCM. Pray you don’t have that.

[@YethandYeth]

@@topher6_9 how did you figure that out boss and you didn’t change the cat then ? Thanks again

[@topher6_9]

@@YethandYeth I believe this was after my first episode with the TCM. I had taken it to the dealer and picked it up, I had sent my TCM off to be repaired, and when I got it home the first night I had no problems. The next day I get in to go to work and I get that code. Take it back to the dealer and they said it was the TCM. Never replaced the Cat. Found a salvaged working TCM on eBay and had them put that on. Thankfully still running fine.

[@YethandYeth]

What was your mileage on your focus when it happened? Well thank you a lot for that I will be looking into that next then bc it does seem strange that I need to replace the cat already even thoe I only got 69230 miles

[@faiezouerhani1841]

Hi friend ,I changed it recently but the problem appear again on my dash board I do no what happened !

[@edgartamez5708]

Mine too

[@jamespruitt4174]

Same

[@mannekan4735]

Probably a sensor

[@tmoney5114]

Did you get it fixed? I have a 2012 focus with 180,000 miles and got the code. Of course when I plan on selling it and getting a new car, the check engine comes on lol

[@pknnbeach7525]

I have a 2012 Ford focus and I thought there was a recall on it.

[@azolaswana9496]

Hi guys. I have a 2017 Ford Focus 1.0L Ecoboost. What does code P3100? Someone said it might be the cat

[@delontecummings3484]

Hey will my car run with this code

[@seaj8049]

yes just might lose some mpg

[@caymftw3520]

@@seaj8049 I can confirm this will lower your mpg

[@johncoldwell340]

There are many problems that can cause that code!! not allway the CAT at fault

[@ZeusKingOfGods1]

I changed it recently maybe few months but the problem engine light appear again ? with same code ?

[@mannekan4735]

Probably a censor

[@raptor074]

Oxygen sensor it's that 90%of the time

[@tmoney5114]

Did you figure it out?

[@dustinreid597]

I’ve cured this code twice just by putting a can of sea foam into a full tank of gas.

[@MrFordguy73]

You just run I can every now and then

[@bigsighmusicdroneblogs1843]

Thsts not a cheap fix

[@MrGentlebutfirm]

Speak a little slower - you have an accent. Don't say guys so many time. Otherwise good job! Thanks

[@tommygunn2794]

Guys