Turbo/exhaust pressure pipe sensor fault

[Frane Selak]

This is just a general question really, I've had a quick look at a car for someone I know that they have just bought (knowingly) with a fault. Car is a 2015 Mazda CX5 2.2 diesel, the fault code relates to the part in the post heading, its not the DPF differential sensor, its the other one that measures the exhaust pressure. When I had a quick look the supply pipe to the sensor is blocked solid just like they do on quite a few different cars apparently, certainly it seems a common problem on various cars that I watch being repaired/diagnosed on YouTube.

I did have a quick go with a piece of wire to unblock it but its solid so he will have to go elsewhere, I don't want to get too involved with it, certainly not this weather. Anyway I noticed that the exhaust is also full of soot as well at the tail pipe, I would expect it to be relatively clean, think the cars done about 80k or so. The EGR was also unplugged when we had a look.

So with all that in mind am I right in saying the DPF is either cracked or been removed altogether and mapped out and because of this the EGR valve is jammed with soot and has also probably been mapped out (no EGR code despite being unplugged) and that's why the sensor tube is also blocked. People don't sell cars cheap that only need a £5 sensor.

Just out of curiosity do those exhaust pressure tubes connect to the exhaust before or after the DPF, I would have thought it made sense to connect them after so they don't get jammed with soot like the EGR's do being so thin.

Cheers.

[normalbloke]

Walk away….

[Frane Selak]

Oh I'm not getting involved, I've got far too much going on anyway. I was just curious if I was right or not as that's what I told him.