OK, so I just bought a 2017 (147bhp) campervan last month with 55k miles on the clock.
One week later, AdBlue warning comes on, telling me to refill within next 650 miles. I make a note to do it next time I'm refilling diesel.
A few days later, Engine Management Light comes on (amber).
I have now added 10 liters of AdBlue and the warnings for that have disappeared, but the EML is still showing.
I've driven another 300 miles whilst waiting for my appointment at the garage, but the light is still on.
Garage now diagnose:
2 fault codes stored -
31103 - SCR NOx Catalyst Bank 1
P20EE 00 [039] - Efficiency too Low
and
33262 - Reductant System Performance Bank 1
P204F 00 [096] - Malfunction
Garage now advises:
Replacing the Nox sensor (£600) and topping up the Adblue followed by a software update (£60), Nox adaption and Ad-blue level reset.
Is it possible that the sensor is fine but the software is at fault? In which case the software update may make the sensor replacement unnecessary?