I would also check the electrical connection to the sensor if you have not already. On my 16 I had moisture get in one of the sensor connectors.

 

OK, here's another question. I can't find the right size sensor wrench locally, and ordering one online will take a week or more. I'm thinking about cutting the wires so I can get a box end wrench on it. If I need to drive the truck before I can get a new sensor in, will the fact that the sensor is completely disconnected put the truck in limp mode or cause other problems? I suppose I could try butt splicing the wires back together, but that seems like it would be difficult in that tight space.

 

Did a little search for you because I was curious... these appear to be the PM sensor codes but it just shows Bank1 Sensor1 which is the MYs before 15 because we have two PM sensors. It does appear you can drive it but just in derate mode is what it appears.

From this page here, I found these PM sensor codes:
P24AE
xxxAF
xxxB0
xxxB1
xxxB3
xxxB7

For all these it states,

"Diagnosis:

The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument cluster message center."


Also, what's the size of nut on the sensor?

 

Thanks for doing that digging for me. I'm definitely bookmarking that code page.

I guess it's a good thing that the P24B0 and P24B7 never made it to confirmed codes. That would have sucked trying to tow the 5th wheel 220 miles in derate mode. I've had full power throughout this episode and had no problems dragging that trailer up some long mountain grades.

But I'm going to guess that if I cut the sensor harness it probably will go into derate mode. I will definitely try to get the new sensor in before I start the truck. But probably not too big of a deal to drive it to a shop like that, if I end up not being able to get the sensor out.

Everything I've read/seen says the sensor nut is 24 mm or 15/16. I couldn't find the size on the ford.com part listing. I briefly tried an open end 24 and an open end 15/16 on it. Both were sloppy enough that I knew I didn't want to keep going that route. Just for kicks I tried a 7/8 crow foot, and it would not go on the nut.

I went ahead and ordered the new sensor (from getOEMparts.com, which was $100 less than buying from ford.com). When the part gets here I'm just going to cut the old sensor harness and go for it with a box end wrench. I could have ordered a 15/16 crow's foot and had it here about the same time as the part. But I figured it wasn't worth the extra 25 bucks.

 

Good idea. Unfortunately my sensor connector is good and dry.

 

Found some more PM sensor codes from that website. Made a Word Doc. Found this link here on the P24C6 code.
I'll update if I find more codes related to the PM sensors.



Particulate Matter Sensor Codes from dtcdecode.com/Ford



Ford DTC P24AE

Particulate Matter Sensor Circuit

The particulate matter bank 1, sensor 1 (PM11) module monitors the PM11 sensor for circuit concerns. This DTC sets when a concern is detected with one of the circuits used to determine the particulate matter content in the exhaust gas.

Cause:

· Damaged PM11 sensor harness

· Damaged PM11 sensor

Diagnosis:

The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument cluster message center.



Ford DTC P24AF

Particulate Matter Sensor Circuit Range/Performance

The particulate matter bank 1, sensor 1 (PM11) module monitors the PM11 sensor for circuit concerns. This DTC sets when the PM11 signal values fall outside of a calibrated threshold.

Cause:

· Contaminated PM11 sensor

· Damaged PM11 sensor harness

· Damaged PM11 sensor

Diagnosis:

The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument cluster message center.



Ford DTC P24B0

Particulate Matter Sensor Circuit Low

This DTC sets when the actual particulate matter bank 1, sensor 1 (PM11) signal is less than the expected value for a calibrated amount of time.

Cause:

· Damaged PM11 sensor harness

· Damaged PM11 sensor

Diagnosis:

The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument cluster message center.



Ford DTC P24B1

Particulate Matter Sensor Circuit High

This DTC sets when the actual particulate matter bank 1, sensor 1 (PM11) signal is greater than the expected value for a calibrated amount of time.

Cause:

· Damaged PM11 sensor harness

· Damaged PM11 sensor

Diagnosis:

The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument cluster message center.



Ford DTC P24B3

Particulate Matter Sensor Heater Control Circuit/Open

This DTC sets when a concern is detected with the particulate matter bank 1, sensor 1 (PM11) heater circuits.

Cause:

· Damaged PM11 sensor harness

· Damaged PM11 sensor

Diagnosis:

The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument cluster message center.



Ford DTC P24B4

Particulate Matter Sensor Heater Control Circuit Range/Performance

This DTC sets when the particulate matter bank 1, sensor 1 (PM11) heater circuits are operating outside of an expected range for a calibrated amount of time.

Cause:

· Damaged PM11 sensor harness

· Damaged PM11 sensor

Diagnosis:

The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument cluster message center.



Ford DTC P24B7

Particulate Matter Sensor Heater Resistance

This DTC sets when the particulate matter bank 1, sensor 1 (PM11) module detects the PM11 heater circuit resistance is out of an expected range.

Cause:

· Damaged PM11 sensor harness

· Damaged PM11 sensor

Diagnosis:

The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument cluster message center.



Ford DTC P24C6

Particulate Matter Sensor Temperature Circuit

This DTC sets when the particulate matter bank 1, sensor 1 (PM11) module detects a PM11 sensor temperature circuit concern.

Cause:

· Damaged PM11 sensor harness

· Damaged PM11 sensor


Ford DTC P24C7

Particulate Matter Sensor Temperature Circuit Range/Performance

This DTC sets when the particulate matter bank 1, sensor 1 (PM11) module detects a PM11 sensor temperature circuit plausibility check concern.

Cause:

· Damaged PM11 sensor harness

· Damaged PM11 sensor



Ford DTC P24D0

Particulate Matter Sensor Supply Voltage Circuit Low

This DTC sets when the particulate matter bank 1, sensor 1 (PM11) module detects a supply voltage concern.

Cause:

· VPWR circuit open

· Battery voltage out of range



Ford DTC P24D1

Particulate Matter Sensor Regeneration Incomplete

This DTC sets when the particulate matter bank 1, sensor 1 (PM11) module detects a PM11 sensor regeneration concern.

Cause:

· Damaged PM11 sensor

· Damaged exhaust system

Diagnosis:

Check the exhaust system for aftermarket modifications, obstructions or damage.



Ford DTC P24DA

Particulate Matter Sensor Exhaust Sample Error Bank 1

This DTC sets when the particulate matter bank 1, sensor 1 (PM11) module detects a PM11 sensor sample error.

Cause:

· Damaged PM11 sensor

· PM11 sensor blockage

· PM11 sensor protection tube damaged

Diagnosis:

Carry out a visual inspection of the PM11 sensor and protection tube. Make sure the sensor and protection tube are undamaged and clear of obstructions.

 

Just corrected my previous comment.

 

Well, I figured I should pop back in here and update the thread with the resolution.

It took two weeks for the new sensor to be delivered from GetOEMParts.com (aka Tasca). While I was waiting, I hit the sensor nut with a hammer and hit the threads with PB blaster every couple of days. Once the new sensor arrived, I cut the wires, heated the bung with a propane torch, and put a box end wrench on it and hit it with a hammer. No dice. Not budging.

So I took it to a local shop that does a lot of exhaust work. I figured if anybody can get that sensor, it's a guy with decades of experience doing exhaust work in the rust belt. He got it out, but destroyed the bung threads in the process. He had a couple of used tailpipes lying around from when he deleted his personal trucks, so he tried swapping one of those in. Unfortunately those tailpipes still had the old sensors in them, and attempting to remove the sensors destroyed those bungs also. Finally he got a used tailpipe off of someone he knows. Not sure if that one already had the sensor removed, or if he was able to get it out. Regardless, I got a used tailpipe that looks better than the one I had, plus I got an upgrade to chrome tips. He charged me 200 bucks plus tax for swapping out the tailpipe and installing the sensor. He even cleared the codes for me. I paid Tasca right at 200 for the sensor including shipping and tax. So I'm all in for a little more than $400. I'll call that a win.

 

$400 was a h3ll of a deal! Glad to hear you got it resolved.

 

he’s got a new customer now 😁

 

Yeah, I've been taking vehicles to him for 20 years. He's known for coming up with affordable solutions that fit the situation. Certain things I know better than to take to him, like any kind of internal engine work is just not his forte, and he has no interest in diagnosing vibrations. But he's great for exhaust, brakes, engine accessories, wheel bearings, drive line fluids, etc.

 

Good deal... and good to hear it's resolved...

 

Necrotic thread resuscitation.

I just encountered this code yesterday, ugh. However, was able to clear the code with the iDash, so no derate experienced and truck appears to regen without issue (regen happened twice on a ~700 mile trip yesterday).

The code doesn't get thrown while running, just upon engine startup. And, truck runs nominally after clearing it. I ordered a new NOx sensor from Ford.OEMPartsOnline, and will just clear the code at startup until it arrives. While shopping online I found many ChiCom aftermarket replacements, but decided to stick with an OEM part, as I really didn't want to have to replace it again due to poor quality aftermarket manufacturing.

Some time this afternoon or tomorrow I'll crawl up under the truck and see if sensor can easily be removed. I'm pretty sure it won't be as stuck as some others have experienced, as I'm not in a region that uses salt extensively. It wasn't stuck on the prior OEM exhaust pipe when I transferred it to the Banks monster pipe. So, perhaps I'll be lucky.

 

Good Luck!

 

Thanks! I wonder, does anyone know whether it's possible to clean the sensor?

While I'm under there I'll also check the wiring to see whether there's any chafing or damage...