Daughter's  A1 2011  tdi  has a glowplug2 unexpected voltage error on start up  ,  just need help  figuring out  what to  buy/replace  to resolve . 

 i will scour the forums and appreciate the wealth of  knowledge  that  your community  knows and shares..

Thanks in advance - 

A

I'd recommend changing the glowplugs. NGK are one option. 

Thanks for your  help Steve.

Are all 4 identical and is it  usual to  replace all 4 ?

Would a 2 and 3 swop  help identify if its  glow plug or  missing  voltage ?

Im worried a broken  wire scenario  would give same error , is the supply  wire possible to test .

Ill get  error  code again  co66  or similiar from memory .

 

Adrian

 

When I had a glowplug issue, I just changed them all.  You're right though it could be a broken wire from the leads. 

Im guessing i can move them one position and see if error code changes ?

There seems to be a 4 volt and 11volt ngk optio  ..anyone got a link or part number Adrian