I got this code pop up P0430 what's the fix to it?

it is on my 2014 ram 1500 SLT 5.7 Hemi that has about 194k miles on it. I don't know if it is the o2 sensor that needs to be replaced or what but I would like to know what are your guys' advice on this code Catalyst system efficiency below threshold (Bank 2). Thank you.

Any mods on the truck? Tuned? At 194k miles have you replaced the o2 sensors? They are technically a 100k mile maintenance item. Truck burn any oil? Been getting bad fuel mileage compared to before?

Not sure but here's what I found with a quick search. https://www.youtube.com/watch?v=acyUAbVR__k

Hopefully others will chime in with actual experience on this.

crazykid1994 said:

Any mods on the truck? Tuned? At 194k miles have you replaced the o2 sensors? They are technically a 100k mile maintenance item. Truck burn any oil? Been getting bad fuel mileage compared to before?

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Only J&L 3.0 Oil Separator and not tuned and no I have not replaced the o2 sensors and the truck isn't burning oil to my knowledge and the fuel mileage got lower but I'm not sure if it's because of using the heater more because I barely use AC in summer.

There are multiple reasons that code may set. Basically what the code is stating that the catalytic converter is not doing it's job, meaning it is not reducing the emissions. However this is based on signals between the upstream and downstream O2 sensor, so if either of those are giving a bad signal it could trick the computer into thinking the cats aren't working. So you could have an issue with the catalytic converter, one or both of the O2 sensors, or the engine is not running right......
Never a fan of throwing parts at a problem and hoping you guess right, but as mentioned above if the O2 sensors have never been changed it wouldn't be that bad to that since they are considered a maintenance part.

truck gets mostly short trips? If that is the case, it could be helpful to take it next time you go on vacation, het some good long miles help burn off that emissions system.

Burla said:

truck gets mostly short trips? If that is the case, it could be helpful to take it next time you go on vacation, het some good long miles help burn off that emissions system.

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I drive to work about 30 mins one way and depending on the location I have to go to it could be an hour and a half one way. I did go on a 3-hour drive the day before.

crazykid1994 said:

Any mods on the truck? Tuned? At 194k miles have you replaced the o2 sensors? They are technically a 100k mile maintenance item. Truck burn any oil? Been getting bad fuel mileage compared to before?

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62Blazer said:

There are multiple reasons that code may set. Basically what the code is stating that the catalytic converter is not doing it's job, meaning it is not reducing the emissions. However this is based on signals between the upstream and downstream O2 sensor, so if either of those are giving a bad signal it could trick the computer into thinking the cats aren't working. So you could have an issue with the catalytic converter, one or both of the O2 sensors, or the engine is not running right......
Never a fan of throwing parts at a problem and hoping you guess right, but as mentioned above if the O2 sensors have never been changed it wouldn't be that bad to that since they are considered a maintenance part.

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From where do you guys suggest I should order both o2 sensors and what brand too? if you could send me the links to them ill order them right away. Thank you guys!

always buy factory sensors. Most likely to work. Some of the odd brand sensors fail immediately or throw the computer off

I got the same code on my truck in March. 190k miles on it. I put a can of BG44K through it with 12 gallons of gas and drove it to empty on a Saturday and the permanent code went away and haven't seen it since.

crazykid1994 said:

always buy factory sensors.

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OEM are NTK

DILLIGAF said:

OEM are NTK

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just to double-check before I order are those the right ones for my truck ( the NTKs) and do I need the o2 sensor wrench or socket like rockauto is suggesting?

What Does the P0430 Code Mean? P0430 is a diagnostic trouble code (DTC) for “Catalyst System Efficiency Below Threshold (Bank 2).” The code warns about a problem with the catalytic converter mounted near engine bank 2 (the side of the engine opposite the number one cylinder).

The best way to remove & install the o2 sensor, is with a wrench like this
the slot is to slip the wire through
There may be other wrench types with the slot

Hattan said:

From where do you guys suggest I should order both o2 sensors and what brand too? if you could send me the links to them ill order them right away. Thank you guys!

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It seems to me that switching O2 bank sensors and seeing if the issue follows makes more sense than firing an expensive parts cannon. I would first swap the after cats sensors and see where that leads.

O2 sensors rarely go bad. Switch sides like BossHogg suggested and see if the problem moves with it. Only thing the post cat O2 sensors do is monitor if the catalytic converter is working or not.

O2 sensors would be the cheapest way to attach the problem if you are going to swap out parts. They also if my memory serves control fuel trims for computer.

No, only the front O2 sensors control fuel trims. Swap rears side-to-side as suggested.

P0430 or P0420 is catalytic efficiency code in which the up stream O2 sensor and the down stream sensor compare signals. A 420 code means that the down stream is seeing to much unburnt fuel. If replacing the O2 sensor, or testing it to see if it is "weak" does not result in a fix then trying these can work.
Running a cat cleaner is the best 1st choice to see if you can clear it.
However if that does not work, and removal and soak in cleaning solutions is not an option.
Then modification is the only option other than a full out replacement.
One of the mods is to use a de-fouler, however during a visual inspection of your exhaust this is easily see by a mechanic / inspector which is not good.

The other option is electrical modification thru an RC filter circuit to decrease amplitude and frequency output that cause the P0420/P0430 codes to be set and during an inspection is less noticeable if done cleanly and wrapped in wire loom it is nearly invisible.
The attached video gives the details, but basically you wire in a 1Mohm resistor on the wire to the computer and then after that (i.e. between computer and resistor) you wire a 4.7uf capacitor between the wire returning to the computer and the ground wire out of the O2 sensor. There are 2 more wires that are for the heater and they are not part of this process.

https://www.youtube.com/watch?v=qHD7T7EhuzI

I had to do this on my Freestar minivan and it worked great with no issues for years afterwards.

Note the down stream O2 is for only checking "cleanliness" of exhaust. Upstream O2 sensors are the ones that are used to determine fuel trims, etc. In short they are just there as a nanny / tattletale device for emissions and can be a royal pain in the A$$ for this very reason.

As already mentions, a P0430 is Catalyst System Efficiency Below Threshold on Bank 2.

It needs to be understood that the PCM uses the signals from BOTH the Upstream and Downstream Oxygen (O2) Sensors to detect efficiency of the catalytic converter. The PCM has a monitor circuit to determine the speed of sensor-to-sensor input/output exchange. So upstream sensor operation can affect downstream sensor output.

I would suggest erasing all diagnostic trouble codes. If you don't have a scanner tool you can disconnect the battery for 10 minutes or discharge the cables. Reconnect the battery cables and switch on the ignition switch. Check to see if the P0430 code has disappeared.

If the P0430 did not return, you likely have an intermittent problem (wiring issue or intermittent O2 sensor).

If the P0430 returns, there's a hard failure. Check for other upstream and downstream codes.

Possible causes:

Damages, corroded wiring
Exhaust leak
Engine performance issue
Aging O2 sensors
Catalytic converter (damage or inefficient)

If you replace a downstream O2 sensor, be aware that the new sensor may cause a new DTC to set on the upstream sensor. On a vehicle with as many miles as yours, I would plan on replacing both downstream and upstream on the affected bank.

A chemical remedy may work if you want to start simple. I personally haven't seen a lot of long term success with it, however.

Regards,
Dusty
2019 Ram 1500 Billet Silver Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33-gallon fuel tank, factory dual exhaust, 18” wheels. Build date: 3 June 2018. Now at 79181 miles

Strategy for Catalyst efficiency monitors vary from maker to maker. They also are changed by the manufacturer from generation to generation and from year to year, so there is no "one size fits all" answer. There are some pattern issues you can check, BUT you really should get it evaluated by someone who is proficient in Mode6 diagnostics and drivability repairs.

A lazy or bad thermostat, worn or fouled plugs, high alcohol content in fuel.... just a few things I've experienced as a professional technician.

Good luck seeking an arm chair fix and dodging a bullet. I can't blame you for trying. But this is really way out of the average BYB (Back Yard Bob) league.

At that mileage, though, the cat has likely had it.