P0430 code

Reply Subscribe

Thread Tools

Search this Thread

Jan 18, 2026 | 09:03 AM

JasonBrod

Thread Starter

Mountain Pass

Joined: Oct 2003

Posts: 196

Likes: 0

From: Dallas TX

P0430 code

I have owned numerous Ford Explorers and now a 2018 F150. At my work I handle a fleet of of Explorers.

Has anyone noticed that when the Ford vehicles hit 180k’ish, that it pops that dreaded P0430 code? Do you think this is hard coded to pop the code when the vehicles get to a certain mileage, forcing the owner to have cats replaced?

Jan 18, 2026 | 10:02 AM

SpencerPJ

Fleet Mechanic

Joined: Jan 2020

Posts: 1,370

Likes: 417

I have to hope not, clear the code and see if it comes back. Now if you were continuously having all the service done at a particular Dealer, I'd scratch my head on that one.

Jan 18, 2026 | 04:49 PM

JEMOORE1962

5th Wheeling

Joined: Jan 2013

Posts: 27

Likes: 2

Quote:

Originally Posted by SpencerPJ

I have to hope not, clear the code and see if it comes back. Now if you were continuously having all the service done at a particular Dealer, I'd scratch my head on that one.

my 2018 F150.... ford replace 10 cats in5 years i use BP gas same location for 20 years the last time PO420 and P0430 came on i use 92
octaine after the 4 tank of fuel the cel went off

Jan 19, 2026 | 07:40 AM

SpencerPJ

Fleet Mechanic

Joined: Jan 2020

Posts: 1,370

Likes: 417

Quote:

Originally Posted by JEMOORE1962

my 2018 F150.... ford replace 10 cats in5 years i use BP gas same location for 20 years the last time PO420 and P0430 came on i use 92
octaine after the 4 tank of fuel the cel went off

That's crazy. My guess you had an additional issue going on, maybe some excessive oil burning??

Jan 19, 2026 | 06:25 PM

JEMOORE1962

5th Wheeling

Joined: Jan 2013

Posts: 27

Likes: 2

It makes no sense. No excessive oil and no coolant leak. The blackstone oil analysis said the engine is perfect. Ford had their engineers look at my truck and they could find nothing wrong.

Jan 19, 2026 | 07:03 PM

JKBrad

Moderator

Joined: May 2005

Posts: 8,234

Likes: 1,248

From: San Antonio, TX

Do you use any fuel additives, or Marvel Mystery Oil? Do you buy your fuel from Top Tier stations that are well maintained to keep contamination out of the gasoline?

Jan 20, 2026 | 08:47 AM

SpencerPJ

Fleet Mechanic

Joined: Jan 2020

Posts: 1,370

Likes: 417

Although BP is no longer top tier gas,I would certainly use it as an alternative. That said, seems suspicious if it is your staple for gas during the whole duration of this truck. If you have the option, I'd consider switching for a year. Good luck!