Technical Fiat Ducato 2021 Particulate matter sensor P24 AE fault - a couple of questions

[jackwhoo]

Which post and photograph or specific info eg part number ,so i can identify the problem

Ok I see .

Post number 7 , sorry for confusion I tried to quote the post but looks like I didn't do it correctly

The photo is of a Nox sensor- which the fault code appears to apply too so correct photo.

The screen shot shows part number and price for a temp sensor- which I don't believe is causing the fault code op has- so details on screen shot incorrect.

Best wishes
J

 

[theoneandonly]

The screenshot was the nearest thing to a GA (general assembly) i could find. Any detail drawing post 2016 is difficult to be sure of. Date wise we have a problem with different update times around the world (even difference between France and UK). Lies damned lies and the internet. (corruption of old phrase regarding statistics)

 

[VXman]

It's been a while since i started this thread but i have only just started to deal with it due to having an accident (me not the motorhome) which meant i haven't really been anywhere in the motorhome since then. I had a service and MOT but my local garage couldn't source the part (or couldn't be bothered is more likely) My multiscan software only says P24 AE so how can I tell which part i need. Costal motorhomes say it is the upstream one that seems to sell more and it's £450 ish. The other is only £47. Fiat professional quoted me £200 but I'm not sure which one it is and they sis say they'd need to scan it to find out - do they use different software?

I'd like to get the part and fix it myself or get my garage to but I really need to know which part it is I need to replace.

 

[theoneandonly]

wHAT IS THE FULL error code. here are 3 possibles and diagnosis

Here is list of possible Particle mattter sensor errors.

 

[VXman]

wHAT IS THE FULL error code. here are 3 possibles and diagnosis
View attachment 463049View attachment 463050
View attachment 463051



Here is list of possible Particle mattter sensor errors.



View attachment 463052

It is P24AE-13 particulate matter sensor -circuit open

 

[VXman]

That is a very interesting and useful site! Still not sure where the sensor that has the problem is though!

 

[theoneandonly]

It is P24AE-13 particulate matter sensor -circuit open

So check the connector then continuity to ECU pins as suggested

Thought id posted this earlier
Where is the sensor I dont know but just searched for ducato particulate sensor location and got a video that said they are basically upstream ie after the DPF and around or after adblu injection. The whole point of the sensor is to see if the dpf has failed.

 

[VXman]

The only sensor I can see on my vehicle is one that looks like number 40 on the diagram below. However, nothing on this diagram is labelled PM sensor.

 

[Reg 65]

Well the engine management light came on again a couple of months and about 2000 miles ago Code P244B - which is apparently the DPF again? with the light on and van losing power but still running ok with normal fuel consumption. I cleared the fault code, the light went out and power restored. Same thing happened again after a few minutes, then again. Then its been fine for the 2 months and 2,000 miles. Now its back again.

 

[bugsymike]

So the ECU is saying the DPF is at fault, which it certainly can be for a variety of reasons that can cause early failure, however did you ever get what I mentioned at #12 in the post ?:-
"I have mentioned on Forum before on another thread that when speaking to a retired Fiat motor home mechanic the DPF pressure sensor was a very common failure/fault on Ducato MHs."

 

[Reg 65]

So the ECU is saying the DPF is at fault, which it certainly can be for a variety of reasons that can cause early failure, however did you ever get what I mentioned at #12 in the post ?:-
"I have mentioned on Forum before on another thread that when speaking to a retired Fiat motor home mechanic the DPF pressure sensor was a very common failure/fault on Ducato MHs."

Yes - I have had a new sensor put in already (posts 4 and 14) under warranty (now expired) , they said its a 'known issue' and it cured the problem for a year, but unfortunately customers can' go in the workshop so I didn't actually see which one they changed

 

[bugsymike]

Yes - I have had a new sensor put in already (posts 4 and 14) under warranty (now expired) , they said its a 'known issue' and it cured the problem for a year, but unfortunately customers can' go in the workshop so I didn't actually see which one they changed

The part I am referring to would have two pipes coming up to it from the actual DPF, one from either end of the DPF to measure the pressure difference before and after in case of blockage. If you can trace it , it may be possible to see if that is the part they changed.
Also with suitable diagnostic tool the two readings can be measured and in some cases the soot content as a %. I was able to do that on a 2012 Citroen diesel I had. It may look something like this, if I have guessed the correct model.

 

[Reg 65]

Well the engine management light came on again a couple of months and about 2000 miles ago Code P244B - which is apparently the DPF again? with the light on and van losing power but still running ok with normal fuel consumption. I cleared the fault code, the light went out and power restored. Same thing happened again after a few minutes, then again. Then its been fine for the 2 months and 2,000 miles. Now its back again.

Now seems to have cured itself again. Hopefully just a bit of muck on the sensor that has been blown away.

 

[bugsymike]

Now seems to have cured itself again. Hopefully just a bit of muck on the sensor that has been blown away.

Fingers crossed. Eh!