2008 adblue failure

Even though I put 10 liters of adblue in my car, the light still did not go out. How can I fix this problem

What model is the car, sir? Unfortunately, there are chronic problems from certain series in edblue warehouses in psa groups. If it's under warranty, you can ask for a free replacement.

Sir, I am thinking of buying a 2020 or later 1.5 bluehdi 2008, but do they have the same horn problem? How can I understand that they are in the PSA group?