Hi 

I have had trouble with ad blue on my Q5 2015 a year ago the garage changed the filter and now the fault has come back and the garage says it is the sensor this time at a cost of £500 +labour and vat can anyone advise 

 

Hi realistically I know Audi have a sense of humour with these thing but that sounds way out of town, I would definitely get a second opinion and a code, at least you can find out exactly which sensor it is and as they have a propensity for using the same sensors on a lot of VAG cars you will probably find the one sensor cheaper for for another model, I would hazard a wild guess its the Nox sensor.

Steve.

The funny thing is both times it has happened it has been very hot here coincidence or what

35 minutes ago, Dave q5 said:

The funny thing is both times it has happened it has been very hot here coincidence or what

Hi try deleting the codes but keep a note of them and publish on here so we stand a better chance of diagnosing the fault, that price though is wrooooong.