Dealer reset several time saying nothing found, light stays clear for up to a day, but comes back. Are the missing something, or just not being honest with me?

Engine light on. Code for DEF pump. Part over $800 plus labor. I have read this has been a problem and wonder if common or am I just lucky as my extended warranty just ended about 2000 ago.

Has anyone been able to bypass this system or is there a better system? Seems like the corrosion from the ammonia the probable cause. What if it goes out fully before I can get fixed?

I have an engine code P202B; adblu tank heater not working. If I decide not to fix it, what than? It never gets cold enough for the DEF to freeze here in south texas.

shop my window washers,the adjustable timed wipers don't work.

CEL came on. Ad Blue Pump out. Not warming the fluid. Cost to repair 1300 at VW. Common problem?