Fault code query!

[Black TDI Turbo]

Hi guys anyone any idea of what causes this fault codes

17964 P1556 Charge Pressure Contr. Negative Deviation

got it a few times causing limp mode, no big deal just curious?

 

[Big_daddy]

Could be a leak.

http://wiki.ross-tech.com/index.php/17964/P1556/005462

 

[Black TDI Turbo]

Cheers mate will have a check over at the weekend. Could this have much to do with the rolling road result k03s with only 195bhp, feels ok on the road and checked maf with new air filter now pulling 176g/s

 

[Big_daddy]

The maf looks healthy, what map have you got to run the ko3s?

 

[Black TDI Turbo]

Its been done by pete at bellautos sponsored link on here, boosts peaks at 17.5psi, so could just ben a case of a mild map which im assuming. Still happy with it tho and drive nice on the road.

 

[Big_daddy]

Could be just a slight leak, you may want to do some more logs to see everything is ok. just be on the safe side.