Last reported case: 2 days ago
Based on 7 owner reports (4 from Reddit, 3 from forums)
What is P0430?
P0430 indicates the catalytic converter on Bank 2 (the side of the engine opposite cylinder #1) is not cleaning exhaust gases as efficiently as expected. This is a medium-severity powertrain code that typically triggers when the downstream oxygen sensor detects too little difference from the upstream sensor, suggesting the catalyst isn't working properly. Based on real data, this code is commonly reported on Toyota 4Runners, Ford F-150s, and Honda Accords, with repair costs averaging $3542.
Common Causes:
- Failed or degraded catalytic converter (most common cause based on repair patterns)
- Faulty oxygen sensor(s) providing incorrect readings to the ECU
- Exhaust leaks before or after the catalytic converter allowing unmetered air to enter
Symptoms:
- Illuminated check engine light (the primary symptom owners notice)
- Potential slight decrease in fuel economy reported by some drivers
- No noticeable drivability issues in many cases, as owners often report normal driving
πP0430 on 2018 FORD F-150
This page focuses specifically on P0430 issues reported by 2018 FORD F-150 owners. The experiences and fixes below are from real owners of this exact vehicle.
Symptoms Reported by 2018 FORD F-150 Owners:
Parts Often Involved:
What Owners Say
Real experiences from 2018 FORD F-150 owners
β2018 2.7L code p0430 Anyone gotten this before? if so was it just some carbon buildup that a good highway drive could blow out or was there real damage to the cats?βView original
βI've checked all the voltage on the O2 sensors and they all seem fine. This light has came on before, usually in cold weather for some reason.βView original
βBut it is now popping on more frequently... Do I have a cat going bad? 253k miles, and it has done a LOT of travelling and hauling some heavy loads .βView original
βI checked the in and out temp on the cats and they seem fine on both sides and no signs of exhaust leaks. I do have almost 96k miles and wondering if some of the plugs are starting to get fouled.βView original
β2018 F150 with the 2.7 throwing P0430 code (bank 2 efficiency below threshold). I checked the in and out temp on the cats and they seem fine on both sides and no signs of exhaust leaks.βView original
βA day goes by CEL comes back on same code. I bring the truck back they replaced all the 02 sensors.βView original
βI bring the truck back they replaced all the 02 sensors. I drove the truck home.βView original
βQuote: 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 offβView original
βQuote: 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.βView original
βNow 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 offβView original
These are real experiences shared by 2018 FORD F-150 owners on automotive forums and communities. Results may vary based on vehicle condition and repair quality.
About This Data
This page aggregates 7 discussions about P0430 from 2018 FORD F-150 owners across automotive communities.
Success rate (0%) is calculated from posts where owners confirmed whether their fix resolved the issue.
Last updated: 3/5/2026