Hey everyone just was wondering what the P0316 & P0430 error codes are for and what's a possible fix for them?

I know that if my scanner and truck was detecting a misfire in a cylinder it would be a P0301 - P0308 error with it but neither of them are detecting there's an actual misfire but it is throwing a P0430 error code right after the P0316 error? I'm just confused on what it could possibly be. Any and all help would be great. You guys have been awesome in helping me straighten out this truck that I bought from a derka derka lot and I regret my purchase but I'm trying to get some of the low lying issues with it fixed so I can trade it in. My dealership that I bought my original truck from is willing to give me $20k trade in with this truck I have now towards a decent low mile used 2023 f150. So again thank you to everyone that has helped me turn this thing around. These 2 errors just showed up 3 weeks ago and this is the first time I've had some spare time to work on it all.

 

First thing you need to do anytime is look up the code descriptions to see what the system has detected, then why to begin the fix.
Code 316 is misfire on first 1000 rpm, at cranking. This code clears when the misfires are cleared.
You need to look in Scanner's Mode 6 Pids for the cylinder misfire counts history, for all cylinders, to know what you have. This data storage history does not set code.
May just need spark plugs, low fuel pressures etc.
These misfires are often from very cold ambient Temps. as an aggravating factor.
Code 430 is driver side Bank 2 CAT Exhaust cleaning efficiency is below acceptable level. An expensive replacement needed.
It might be the results of the Misfires that would have to be taken care of first, because misfires can allow raw gas to burn in the Cat and ruin them new or old.
Never let misfires go due to this possibility.
To 'boot', ....a CAT Emissions test is done at every start-up to check both CATS for acceptable operation.
This test involves fast heat-up from cold Ambient to Max. ,then back to normal average running temps.
The rear Ox Sensors report the results.by sensing CATS Ox levels during the test interval. These Rear Sensors are located right in the middle of the rear CAT internl substrate Bed.
Truck's whole system is a complex operating computer system.
You have to work with it at that level.
Good luck.

 

Thanks for the information. I haven't had the misfire error's return since the outside temp has since warmed up, like they're completely gone now and so are the other errors that has come with it. I also plan to swap out all the sparkplugs as they're probably due to be changed anyways since the truck has 114,000 on it. This damn lemon of a truck I bought has cost me more money, time, and headaches that my original 2018 I had ever did...

 

I have also observed one or two misfires occasionally during cold temps on startups on bank 1 but go away. These are recorded in mode 6 memory as the only place you can see it and the cylinders involved.
Not seeing any issues, it must be due to the Emissions test that is entered at startup.
Usually Plugs , after they are in service for some time will erode just enough to cause it but not misfire in normal drive cycles.
The Timing goes retarded, Fuel goes Rich, Idle goes up for more air, in order to fast heat the CATS for the test that takes about 5 minutes.
Good luck.

 

one more thing worth checking alongside the plugs — coil-on-plug boots on Bank 2. P0316 is a cold start misfire, and worn COP boots are a classic culprit on the 5.0 in this generation. they'll cause a misfire at crank that clears once everything warms up and the gap closes. cheap to check, just pull each coil and look for carbon tracking or cracks on the boot tip.

also with the P0430 showing up after the misfire codes: Bluegrass is right that misfires can cook a cat. before you condemn the cat though, let the misfire issue sit fixed for a couple weeks and let the ECU run its monitor cycle a few times. sometimes the P0430 clears on its own once the upstream cause is gone.

 

I'll give all these ideas a check then, yours and bluegrass's. Thanks fellas for the help

 

I too am starting to experience the P0430 code problem.
It started about a 3 weeks ago with a misfire. Cleared the code using a Forscan. Lasted about a week and again the P0430 popped up.
The diagnostics shows all of the sensors at "NO FAULT".
Only discrepancy I see is in the Scope function of the software where the O2S22 voltage fluctuations are slow compared the O2S12 on the passenger side (please see attached pdf)
Can any of you friends be able to give me some insight as to where my problem could be?

 

Don't know what two data points are from.
If from the rear Ox Sensor of the failing bank, it shows the Cat is not working if the trace tends to follow the front instead of being relatively flat.
What does the 430 code description tell you?
One thing you can try is one of the Cat cleaner Gas Additives and give it some time to work, then look at it again to see if there is any improvement.

If the rear Ox Sensor moves with the front, a signal Ratio # is generated that sets the code because the CAT can no longer clean/store clean Ox the rear Sensor is looking for.
Good luck.

 

Thank you Bluegrass for your prompt response.
The Scope traces you see on the attached pdf are as follows;
Top is from O2S22 and the bottom from O2S12. As you can see the Bank 2 sensor voltages change much slower than the Bank 1 sensor.
I will try the cleaning additive as you suggest and see where it takes us. If no joy, would you suggest tp try changing the sensor before replacing the whole Cat system?
By the way, I am using the pickup in central Europe. Here we burn 91 Octane gas. I don't believe that should be of concern.
Thank you,
George

 

.
Only look at both rear Sensors for Voltage output compare.
They both should be fairly stable unless the Cat/s is/are not actively cleaning the exhaust enough.
The Sensors must detect Ox to stay stable in output. That's the key. They report this to the PCM at starting and any other time it would occur.
If a movement Ratio fails to occur compared to the front, that becomes too small (rear moves to much), a code is set.
Only thing between front and rear Sensors is the CAT.
Good luck.