Not personally but I work in a Garage and it is very common for the DPF pressure sensor to fail on any brand of car.

 

Is the DPF pressure sensor, the same as Particulate matter sensor? I thought the PMS was post DPF to check particulate in exhaust, basically soot sensor?

 

I think the main point was that these parts are generic and if Alfa cars are suffering issues they are not alone.

 

Been diagnosing and changing these sensors left right and centre, and they are hard to get delivered. Wasn't on FCA cars though. but besides an annoying light, they dont do anything to engine performance or cause damage to the exhaust so it isnt the end of the world.

 

Looks like my car has it again its a Guilia though 70 plate that is twice in a year... should I be expecting this every year

 

Can anyone help in pointing out exactly where the Particulate Matter Sensor is located ?

I've had a P24D100 error occur on and off for a short time now. The usual CEL and DNA disable occur and the local dealership just moan at me about not doing enough motorway miles to trigger sucessful DPF regens.

I know it isnt either of the top 2 sensors visible on top of the DPF as when disconnected they trigger pressure and NOX sensor errors. I'm assuming its post DPF ?

 

Did this fix your issue? I’m having similar on my Giulietta, and wondering if it’s as simple as a faulty sensor

 

I fixed it on my 19 Stelvio.

The Particulate matter sensor is located at the very rear of the exhaust and fits in a boss like a NOX sensor.

Initially I really struggled to find the exact part but realised that the sensor comes in 2 distinct parts. The sensor itself which bolts into the exhaust pipe and the sensor to CAN bus module.

I acquired a used but very low mileage sensor from a 20 plate Fiat Doblo. Swapped just the sensor cable part over, leaving the existing CAN module in place, cleared the code and havent had it reappear since. Not a bad fix for 60 quid and 10 minutes rolling round on the floor.

 

Have you by any chance got a link to the part you ordered?

 

I bought Stelvio 2.2td and withing 4 days eml came on due to blocked dpf. Long story short after months of battle found out dpf was mapped out. Mapped back in all working 100% with regens and resistance and differential pressure almost zero after regen except p2002 keeps coming up. Saw on my Launch x431 today that the pm sensor showing 100% soot accumulation seems stuck. Wondering if its faulty sensor or when mapped back into ecu was faulty mapped back? Doing my head in with all these cowboys working on Alfa calling themself specialists

 

So I think P2002 means the ECM thinks the DPF is blocked, not related to this thread.

If regens are happening and the dpf pressure differential is low (0-50mbar), I'm wondering if the recent remap fix is using the correct clogging thresholds.

The clogging parameters are basically maths based on driving profile and time, not sensor readings.

edit:
Maybe this error is also now using the sensor in the exhaust tailpipe to conclude that the DPF must be clogged. The sensor could have got coated with soot while the dpf wasn't working and so is returning a high value rather than being seen as faulty (P24D1)