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2016 Volkswagen Tiguan AdBlue error

Hello, i have adblue issue on my car, i get both adblue and engine check errors at the same time. they both come and go. i did check under the hood and saw crystalized urea built up around adblue injector. im wondering should i pay for replacement injector or is it factory error?

Could be simple, but would need you to post the trouble codes for us.

Hello, i have adblue issue on my car, i get both adblue and engine check errors at the same time. they both come and go. i did check under the hood and saw crystalized urea built up around adblue injector. im wondering should i pay for replacement injector or is it factory error?)

Hello!

This could be something simple as DEF/AdBlue needing to top up.
Did you check the AdBlue level?
Also, failed in-tank heater is a common cause, as well.

Hope it helps.

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