Stick your hand down there and feel them, from above

One of the DPF pressure sensor hoses has split most probably, common problem on the k9k 1.5dci Pain in the backside to change them I wouldnt recommend it, unless your very good with your hands and you've done a bit on cars. It's always the pre cat hose that splits it's at the very back of the engine...

You have to just pop the airbag out of the steering wheel and check or get Nissan parts to get you a part number and go with that

No it's for one stage or two stage airbags. The buttons have a socket on the back and a socket on the front of the spiral cable

It's literally just the k9k that's flywheel side mate that I know of in the nissan range.

Easiest way to be sure is exactly what you've done disconnect one of the injectors and see which code flags, just dont recommend unplugging whilst it's running as piezo injectors could potentially stay open

They should recieve a new code if it's been reconditioned and then be printed/etched in to the top of the injector. If it's still got the old code on top of it I would say it's a poor reconditioning company because it should have a brand new piezo stack actuator fitted on every injector and then hav...

What Software level are you on ? 0821 is the latest and fixed bluetooth pairing issues and rebooting issues

0818 software fixes incorrect time
0814 also fixes incorrect time

Have you seen the melted dpf? Pictures would be ideal so that we can agree its melted or not, might be just guessing and the service advisor or desk person who has no mechanical knowledge whatsoever is just making up some bull to justify them changing it.

Which unit do have connect 3? Connect 3 evo? Or the new alliance nissan connect with no SD card

Dont suppose your child lock is on by anychance?