Fault code p204B00 can you help

[Dave q5]

Is the above fault code related to Ad blue 

has anyone had a success with Audi sorting it 

[Steve Q]

I guess it depends what's wrong with the system. If the wrong adblue has been used then they won't. The system might just need resetting, draining or a level sensor might need changing. 

[Dave q5]

I have had it plugged in and reset but now waiting for the warmer weather to come as it seems to affect it 

have written to AUDI and they don’t want to know 

[Stevey Y]

On 9/4/2021 at 5:21 PM, Dave q5 said:

I have had it plugged in and reset but now waiting for the warmer weather to come as it seems to affect it 

have written to AUDI and they don’t want to know 

Hi Audi recommend draining the system every two years under normal circumstances/milage, I have never had to purge my system as its a cab and it never stays in the tank for longer than 9k so it gets 17 litres about every three months.

I f it stays in the tank for to long it will crystallise and cause problems.

Steve.

[Dave q5]

That’s interesting will get the garage to change it 

thanks