With regard to the Adblue systems, the earlier systems had teething problems - the tanks for example had a lot of metal components inside which over time, were adversely affected by the UREA solution causing corrosion and blockages. So the newer tanks were changed to incorporate more plastic components to prevent this. A lot of these tanks were replaced under warranty within the 3 years / 60k miles or equivalent, but in a lot of cases, PSA made some varying contribution to replacing these when they were out of warranty depending if the car had been serviced properly of course. So that is an example of where they have improved these.
Another was the unvented cap - which could hinder the pump from working correctly and cause it to break down - requiring a complete tank replacement because of the reasons already mentioned. A vented cap was introduced on affected models to solve that.
Then there was the issue of the NOx sensor harness wiring getting cut / burned through leading to the engine thinking the Adblue tank was empty and preventing engine starting.
Posted May 17, 2022 (1 year ago)