Easy Fix for Code P0420 or P0430 Catalyst Efficiency Below Threshold Ford F-150.

In this video, I will show an easy and cheap fix for Codes P0420 or P0430 Catalyst Efficiency Below Threshold on banks 1 or 2.
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[@737mechanic]

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[@Powerstroke98]

I have the same code that had my check engine light come on, on my 2016 3.5 Eb. I do have a code reader, which has allowed me to delete the code...and so far (one week) it hasn't reappeared! Apparently another trick to find out more information, is to take the truck for a drive, and at a location where you can slide under the truck, take one of the laser devices to check for how hot your exhaust is. The inlet side (turbo side) 'should' be less hot, than the exhaust (outlet) side. It seems whatever action that goes on inside the CAT, it heats even more to burn off the gasses, thus is hotter. Mine was around 100 degrees hotter coming out of the CAT than going in. So, I'm thinking or assuming my sensor made need replacing! Another trick mentioned today by a highly recognized Ford Tech, was to take a rubber mallet (once cooled down I believe) and tap the bottom of the CAT, and listen for something bouncing around inside (the one he was tapping sounded like it had some rocks inside bouncing around). Thanks for the video! On edit- the previous owner took off the shield, and it's never been put back on, and I've had no issues in not having it. Also, another tip, they say to undo the electrical clip of the sensor, before taking it out. As you turn it, the wire turns as well, so you need it disconnected!

[@proudtexan5513]

Awesome trick and video!!

[@JasonTheHusky]

I did this same thing in both the converters on my old 07 Lincoln MKZ

[@brutusmaximus5380]

The way I see it. The p0420 is the biggest scam automakers have come up with. Here's why. Even if your cat is below efficiency, it still is working to clean the emission. It's just contaminated with oily residue from bad gas. So get some premium fuel and ride that car the way Italians do to clean their cats. They go to Germany and ride the Autobahn at +90MPH. The deal is that whenever this code comes up, the dealer will upsell an OEM cat that costs hundreds of dollars to install. Even with a new one, that P0420 may still come back if you don't remedy the underlying problem. For me, the shop that changed my oil filter added a little too much oil and this went through the PCV valve and into my intake manifold and fouled up the cat. That's the scam. Now I have to use that oxygen sensor spacer till the cats burns through that oil. I'd rather burn through that cat till the core melts. In my county, we don't do emissions. Rural areas don't have as many hippies messing up our way of life and telling us how to run our cars. Our air is clean because the area is sparsely populated by criminal government types unlike the big cities.

[@careysmith9208]

I’m getting the same kinda code in my 2018 3.5 . Needing me a local mechanic in the Houston area

[@AP-xq3jm]

That's a nice SouthWest Airlines tool chest in the video at 2:31. Did you soak the O2 sensor in AeroKroil before removing it.

[@737mechanic]

No, It unscrewed easy enough so I didn't have to do anything special.

[@freeskiersky]

Thanks for the video. What size bit did you use to open up the hole in the non-fouler? Looking to do this project this weekend to address my P0430 code. Thanks!

[@737mechanic]

I don't remember off the top of my head, I picked one out of my collection that was slightly bigger than the O2 sensor.

[@Powerstroke98]

@@737mechanic I saw another video on this same trick, and they opened it up pretty good with a larger bit.

[@rahshadswinton8225]

Hey man... Ive been trying to figure out if it's driver or passenger side. 30 is driver per previous answers. Thanks

[@Powerstroke98]

Bank two I believe is the left side, or drivers side.

[@jarvicerandolph9949]

Is this addressing the underlying issue, or just keeping your enging light from coming on?

[@737mechanic]

It reduces the sensitivity of the downstream o2 sensors so the engine light won't come on or won't come on as quickly. The underlying issue is the catalytic converters are losing their efficiency. The right way to fix it is to replace the catalytic converters. I just looked up the price of them now and they are about $300 per side or you can try this $5 fix and get down the road for a few more years.

[@Powerstroke98]

@@737mechanic Yeah, I noticed there are a few brands on Amazon, in the $300.+ USD range.

[@matthewgilmore5307]

put alcohal in the gas tank and run for several miles to clean the converter and never bye a converter word from the pros

[@737mechanic]

Not only have I tried that but there are many videos on KZbin that show it does nothing.

[@TurnThemWheels]

Lacquer Thinner works just enough to get monitors ready and pass annual inspection

[@737mechanic]

@@TurnThemWheels I have tried it and it didnt work for me and there are youtube videos of people trying it and it didn't change anything.

[@TurnThemWheels]

@@737mechanic gotcha it worked well enough to get a 07 Tahoe P0430 to pass Texas inspection

[@mouradait340]

What kind of alcohol? Methanol?

[@manuelbarrios8941]

I have a Ford Expedition and I have had the code P0420 from 7 months ago, friend I changed the catalyst and the oxygen sensor and the engine check is still going on, my car is 2020, what can I do? Do I do what you did in the video? Where can I buy that piece of the video? Do I necessarily have to go to a turner to modify the piece? I don't know what to do anymore, I added some caralizer cleaner and it didn't work either.

[@manuelbarrios8941]

clean catalyst I meant, cataclean and it didn't work

[@737mechanic]

@@manuelbarrios8941 You can try the spacer and that will probably help. You may not need to drill it out but if the O2 doesn't screw into it you will have too. Make sure you get it on the correct bank. On a lot of ford engines bank 1 is on the passenger side and bank 2 is on the drivers side.

[@hermanguzman1460]

You can also get longer non-foulers that require no modifications, O'Reilly's carries them 2 for around $12 dollars, I installed them in my 2014 f150 a week ago and so far the check engine light hasn't come on, one thing I did notice is the miles per gallon average did go up, don't know if this is because the computer thinks new or what but as long as the light stays off it's good.

[@mikekeo3172]

To confirm for P0420 and P0430, these are the two cats for passenger and driver side?

[@737mechanic]

That is correct.

[@markbulva4188]

Where do you buy them and what are they called

[@737mechanic]

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[@Powerstroke98]

@@737mechanic These show that they are out of them...on the Canadian Amazon site they had them yesterday when I looked.

[@bernardaflores1720]

Nice trick at 120k it seems way to soon than normal.

[@Powerstroke98]

I'm at 138 on my '16 and dealing with the P0430 code.

[@antonylesten7319]

What size thread is the anti-fouler?

[@737mechanic]

18x1.5

[@JorgeGonzalez-zw5yo]

Was the the driver side?

[@737mechanic]

Yes

[@PGuerrero1179]

Bank 2 is the driver side? And how did the check engine light came off?

[@PGuerrero1179]

Do you the battery?

[@737mechanic]

@@PGuerrero1179 Bank 2 on this f-150 is the drivers side. The light will go off eventually after you drive it enough or you can clear the code by either disconnecting the battery or using a scan tool.

[@PGuerrero1179]

Thank you.