We are out a few states with the RV and 22 450. While driving around yesterday the check engine light came on, 6000 miles on the clock. Pulled the P249F code that referred to regen and sensors. Ford app sends a message that truck is doing regen too much. Truck has always shown 0% almost every time I check the dash which is nothing like my 17 that would always be going up to 100 and then regen. Heading to local dealer on Monday to have it checked out. Anyone have any experience with this one, and is this a 22 system thing?

 

Likely one of your EGT sensors is faulty, the dealer should have them and be able to fix you up quickly.

 

Has your truck actually been going into regens so often?

 

https://www.dtcdecode.com/Ford/P249F

Could be a couple of different things according to the above info.
EGT sensor, or a DPF pressure sensor, or a damaged DPF.

And, no, not anything specific or new for 2022 models.

 

Possibly, actually it has spent alot of time at 0%. It has not gone off of 0 since the light came on yesterday. Probably drove 100 or so miles. My 17 would not stay on zero and went back up to 100. Seems like it is doing too many regens. Mileage is 12.5 average, 11 towing. Might go up after repair.

 

So recently mine has been stuck at 0%, although the iDash reads differently. However, I never rely on what aftermarket gauges say since the truck actually dictates when it goes into regen. But I know that my truck has not been going into an active regen because I have auto regen turned off. No codes have popped up, but not seeing it move from 0 has me on edge a little bit...

A little bit of history for my situation, I ran an active regen on mine a little over 2 weeks ago, then the next day I towed my camper home 700 miles and it passively regened the entire time. Needless to say, I was at 0% the entire time. About a week after towing is when I first noticed the DPF% was still at 0%, so I checked and re-enabled auto regen. Since it had been past the 500 mile mark that the truck is programmed for, the EGT's immediately started going up and according to my iDash, the regen activated... so despite that the truck read 0% I drove until the regen completed according to the iDash (about 15 miles) and then shut it down when EGT's were back to normal. When it was all done I turned the auto regen back off, so I know it hasn't regened since. I've probably got a little less than or right at 100 miles on the truck since that regen, but most all of my driving has been city driving... stop and go at red lights and not really high speeds. In the past, this amount of driving in these situations would have caused my DPF% to climb some by now...

So I don't know... maybe since I did a regen one day, then passively regened for 700 miles the very next day, and have now completed another active regen just due to the programmed mileage, maybe my filter is just really clean... but I will be really happy when I see the DPF change from 0 to 5%.

 

Thanks for that added info. I am really curious what the dealer is going to do Monday. The difference between the 17 and 22 regen is night and day. The truck is performing as it should. I will report results after repair.

 

Hopefully it won’t be anything much. Looking forward to hearing what they say.

 

Just returned from local dealer. Truck had P2459 and P249F codes. Checked all related items and they were all OK. Ran PCM check and vehicle passed. Reset CEL and sent me on my way. DPF % still at 0. Anyone else have a 0 % on for long periods of time?. My 17 went up from 0 after a short period of time.

 

Don't be surprised if you get the same code back shortly, I believe you have bad EGT sensor.

 

Wouldn't a bad EGT sensor show up on the dealer scan? Dealer claimed it was just a blip. Thanks for the info.

 

Not necessarily because the sensor is reading still just not correctly, causing the regen condition you are experiencing and staying at 0%. The code is telling the Tech of the condition present, the Tech needs to evaluate why. This would be to look at the sensors, that takes work so they probably reset and sent you on your way. Maybe this will not be an issue and I'm wrong, just a heads up though.

 

Thanks for the explanation, it make sense. If it stays on 0 on the trip home I will take it to my selling dealer for a more comprehensive evaluation. 👍

 

Well, you have two related codes pop, if just one, maybe reset and it never comes back, so it was a glitch or hiccup, but when you have two related codes, very likely a real issue and the code(s) will come back after a while.
I seriously doubt the dealer you went to did a proper diagnosis, and I agree that there is likely a bad sensor.

But, until the code(s) pop again, no point in taking it back to your dealer as the earlier codes have been cleared by the other dealer, so your dealer won't be able to see them. Without a code, they won't want to mess with it unless you are willing to pay for their time.

 

I was watching an older video last night and a guy showed that there is a permanent memory in IDS that codes are saved in, however, he wasn't sure how permanent they are. But, if you brought it to another dealer, the codes may still show up as past codes.

And mine is still at 0%, but no codes are popping up and none have showed up when I scanned it yesterday with Forscan or my iDash. I am wondering if it could be the particulate matter sensor rather than an EGT sensor. Saying that though, I know some have picked up a lineman wrench and the EGT sensors just to have on hand so they can be changed if they do go out. They are definitely easy enough to get too... Does anyone have the part numbers for the EGT 1-4 sensors? Would be nice to have a spare particulate matter sensor too... can't remember if that the one that was left off of orders though, so that one may not be able to be found...

Let us know if you find out anything else... I keep watching mine just hoping to see it move to 5% so I will know it's still working!