Particulate matter sensor
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Mountain Pass
Joined: Dec 2024
Posts: 147
Likes: 86
Dunno. Might as well replace it while you're at it. It's a known common failure in the 15 and 16 trucks. Ford put out a TSB a while back that basically said if you get a PM sensor code, replace the sensor. They didn't say anything about attempting to clean it.
Cross-Country
Joined: Jan 2026
Posts: 54
Likes: 12
From: San Pedro CA
Might want to check out DTC bulletin from ford #20-2369 it is specific to the 15 and 16s. And related to the dpf temp issue. It is saying that these years have a computer glitch and the computer will need to be brought up to date and if the pcm is current then they recommend performing a re flash to reset the PCM.
I am stuck in Redding Ca right now taking mine to a shop in the morning to see if they can do it. My truck is constantly putting itself in regen every 50 to 60 miles. Finally it threw a code of P24AO. I have replaced the DPF pressure sensor and EGT 12. (Will never do that again along the road side) and still same issue but not as bad. I believe the P24 codes may all be linked to the glitch even though the bulletin only refers to the 24AO code. May be worth updating the computer and re flash it before tackling the sensors. The sensor replacement on the road side is a whole nother story.
I am stuck in Redding Ca right now taking mine to a shop in the morning to see if they can do it. My truck is constantly putting itself in regen every 50 to 60 miles. Finally it threw a code of P24AO. I have replaced the DPF pressure sensor and EGT 12. (Will never do that again along the road side) and still same issue but not as bad. I believe the P24 codes may all be linked to the glitch even though the bulletin only refers to the 24AO code. May be worth updating the computer and re flash it before tackling the sensors. The sensor replacement on the road side is a whole nother story.
FTE Legend
Joined: Mar 2017
Posts: 31,882
Likes: 9,176
From: Western NY
Might want to check out DTC bulletin from ford #20-2369 it is specific to the 15 and 16s. And related to the dpf temp issue. It is saying that these years have a computer glitch and the computer will need to be brought up to date and if the pcm is current then they recommend performing a re flash to reset the PCM.
I am stuck in Redding Ca right now taking mine to a shop in the morning to see if they can do it. My truck is constantly putting itself in regen every 50 to 60 miles. Finally it threw a code of P24AO. I have replaced the DPF pressure sensor and EGT 12. (Will never do that again along the road side) and still same issue but not as bad. I believe the P24 codes may all be linked to the glitch even though the bulletin only refers to the 24AO code. May be worth updating the computer and re flash it before tackling the sensors. The sensor replacement on the road side is a whole nother story.
I am stuck in Redding Ca right now taking mine to a shop in the morning to see if they can do it. My truck is constantly putting itself in regen every 50 to 60 miles. Finally it threw a code of P24AO. I have replaced the DPF pressure sensor and EGT 12. (Will never do that again along the road side) and still same issue but not as bad. I believe the P24 codes may all be linked to the glitch even though the bulletin only refers to the 24AO code. May be worth updating the computer and re flash it before tackling the sensors. The sensor replacement on the road side is a whole nother story.
Good luck @Euroman ... did you have a problem with that code?
Fleet Mechanic
Joined: Oct 2022
Posts: 1,822
Likes: 898
From: Dallas Metroplex
Well, seems like the truck learned that I ordered a new sensor, somehow. I took the truck on an errand yesterday, and lo and behold, no more code thrown. Weird.
I'm going to replace the sensor once it arrives anyway, but it's strange that it's no longer throwing a code on startup. Guess I'll find out if it's consistent tomorrow. Kinda makes me think that I might have that same wire shorting issue mentioned upthread.
I'm going to replace the sensor once it arrives anyway, but it's strange that it's no longer throwing a code on startup. Guess I'll find out if it's consistent tomorrow. Kinda makes me think that I might have that same wire shorting issue mentioned upthread.
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FTE Legend
Joined: Mar 2017
Posts: 31,882
Likes: 9,176
From: Western NY
Hey Joe, here's a pic of the inside of my PM sensor, if yours is not there and for everyone else to see, for reference about "cleaning" it... I wonder if a MAP sensor safe spray cleaner would work.
I mean, it's made for an environment that goes up to at least 1200 deg F so I can't imagine a sensor safe cleaner would harm it but I sure wouldn't stick anything up in there but maybe a q-tip by those holes...
But who knows??
Fleet Mechanic
Joined: Oct 2022
Posts: 1,822
Likes: 898
From: Dallas Metroplex
Now that I think about it, with the mention of high temps and whatever soot that runs down the pipe I'm guessing over time that it could eventually get pretty caked up. Probably not worth attempting.
BTW, the few times the code didn't trip was a fluke, apparently. It's back to being tripped at every startup again. In any case, I'm still awaiting shipment and receiving it. I'm at the ranch for a few days so hopefully it'll arrive sometime next week. Until then I'll just keep resetting the CEL with the iDash.
BTW, the few times the code didn't trip was a fluke, apparently. It's back to being tripped at every startup again. In any case, I'm still awaiting shipment and receiving it. I'm at the ranch for a few days so hopefully it'll arrive sometime next week. Until then I'll just keep resetting the CEL with the iDash.
FTE Legend
Joined: Mar 2017
Posts: 31,882
Likes: 9,176
From: Western NY
Now that I think about it, with the mention of high temps and whatever soot that runs down the pipe I'm guessing over time that it could eventually get pretty caked up. Probably not worth attempting.
BTW, the few times the code didn't trip was a fluke, apparently. It's back to being tripped at every startup again. In any case, I'm still awaiting shipment and receiving it. I'm at the ranch for a few days so hopefully it'll arrive sometime next week. Until then I'll just keep resetting the CEL with the iDash.
BTW, the few times the code didn't trip was a fluke, apparently. It's back to being tripped at every startup again. In any case, I'm still awaiting shipment and receiving it. I'm at the ranch for a few days so hopefully it'll arrive sometime next week. Until then I'll just keep resetting the CEL with the iDash.
Fleet Mechanic
Joined: Oct 2022
Posts: 1,822
Likes: 898
From: Dallas Metroplex
Y'know, I might just try to spray it with some MAF cleaner, and if it works it works. I'm still planning on replacing it with the new one anyway, but still awaiting its arrival. If using the cleaner temporarily keeps the code from being thrown then that'd be cool. But, with ~107K that sensor lasted a long time, so replacing it is probably good preventative maintenance anyhow.
FTE Legend
Joined: Mar 2017
Posts: 31,882
Likes: 9,176
From: Western NY
Y'know, I might just try to spray it with some MAF cleaner, and if it works it works. I'm still planning on replacing it with the new one anyway, but still awaiting its arrival. If using the cleaner temporarily keeps the code from being thrown then that'd be cool. But, with ~107K that sensor lasted a long time, so replacing it is probably good preventative maintenance anyhow.
Fleet Mechanic
Joined: Oct 2022
Posts: 1,822
Likes: 898
From: Dallas Metroplex
I'm not going to bother cleaning the sensor, as the new one arrived a few days ago (just in time for the rain to put the kabosh on dealing with it). After thinking that I already had a sensor socket that would work discovered that it is a standard 22mm socket, and not a 24mm one required for the new NOx sensor, argh! So, I'm expecting the new crowfoot socket plus a 22mm X 24mm flare nut wrench to arrive tomorrow. Meanwhile, I've been soaking the sensor with PB Blaster for the past few days, so hopefully won't have to break out a torch to assist with removing it. Got plenty of anti-seize compound in case it needs replacing again (still kicking myself for not putting some on when installing it in the Banks exhaust pipe).
I'm not really sure just what the Ford engineers were thinking however, tucking that sensor module mount up and above the spare tire, SMH. Anyway, just thought I'd post an update while I'm here on the forum today.
I'm not really sure just what the Ford engineers were thinking however, tucking that sensor module mount up and above the spare tire, SMH. Anyway, just thought I'd post an update while I'm here on the forum today.
Last edited by JoeUser; Mar 11, 2026 at 12:52 PM. Reason: spelling
FTE Legend
Joined: Mar 2017
Posts: 31,882
Likes: 9,176
From: Western NY
I'm not going to bother cleaning the sensor, as the new one arrived a few days ago (just in time for the rain to put the kabosh on dealing with it). After thinking that I already had a sensor socket that would work discovered that it is a standard 22mm socket, sad not a 24mm one required for the new NOx sensor, argh! So, I'm expecting the new crowfoot socket plus a 22mm X 24mm flare nut wrench to arrive tomorrow. Meanwhile, I've been soaking the sensor with PB Blaster for the past few days, so hopefully won't have to break out a torch to assist with removing it. Got plenty of anti-seize compound in case it needs replacing again (still kicking myself for not putting some on when installing it in the Banks exhaust pipe).
I'm not really sure just what the Ford engineers were thinking however, tucking that sensor module mount up and above the spare tire, SMH. Anyway, just thought I'd post an update while I'm here on the forum today.
I'm not really sure just what the Ford engineers were thinking however, tucking that sensor module mount up and above the spare tire, SMH. Anyway, just thought I'd post an update while I'm here on the forum today.