Hey guys,

Looking for a bit of advice before I start throwing money at parts.
Got a 2020 Transit Custom that’s been doing an exhaust filter cleaning pretty much every trip lately. Now it’s come up saying “DPF full”, spanner light on, and it’s gone into what feels like limp mode. Thing is, I’m about 90% sure the DPF itself isn’t actually blocked. I plugged in the OBD scanner and it’s showing these codes. 

P22FB – NOx sensor fault

P246C – DPF restriction – soot accumulation too high

P2463 – DPF soot accumulation

While driving, I checked the live data and noticed the DPF pressure sensor readings were acting weird. From memory, the reference voltage was around 0.635.55 or something, and when I put my foot down, the kPa reading shot right up to 635 kPa, matching that reference number. Doesn’t seem right.

The van starts fine, runs fine, no smoke or rough idle, just the DPF warning and limited power, and I believe it’s pretty much doing exhaust regen constantly now, I can smell it.

Before I go and drop £500+ on sensors, I’m wondering would a faulty NOx sensor and/or DPF pressure sensor cause the van to think the DPF’s full and trigger limp mode, even if it isn’t actually blocked?

Anyone had similar symptoms or found a fix before replacing everything?

Hi there, 

I’ve the same problem with my Ford Transit Custom..

did you ever found the solution to your problem?

I already got a new dpf, and EGR but still the same problem, and the faulty codes are permanent says the computer.

I hope to hear from you.

 

Thanks 

Look at Jimmy's channel and view several examples that match your cases (there's a LOT of repetition, the issues are generally the same and there is little real knowledge out there in lots of garages!
DPF is 99+% a victim of another problem, as you'll see and can go from there.
I'll say: Vaporiser, check sensor output, use Forscan to check pressures at off, idle, 300 rev/min, check wiring, check pipework isn't blocked, avoid forced regens, use a cleaner spray (e-Bay) etc are some of his key ideas:
 https://www.youtube.com/@ORileysAutos/videos
Don't change anything without clear evidence and analysis?