So I just bought a 2018 1.5 HDI Ds7 crossback
Within 6 days I got a warning whilst driving ad blue, emissions fault, starting impossible. The car then went into a lockout and got it towed to a garage. I was told that the pressure in the DPF was high and was not regenerating properly. They cleaned the DPF and brought the pressure down and cleared the codes. 6 days later I brought it back to the garage and a code came up:
Intermittent Denox system, pollution effectiveness performance or operation does not conform, p20ee:92
Yesterday The garage cleared the code to see if this was something that was a knock on effect from after the DPF fix. Now today whilst driving I got the same ad blue emissions fault, starting impossible.
I have a feeling this is something to do with SCR catalyst or Denox sensors but looking to see if anyone else has experienced the same/similar issue and how to resolve.