If you get the problem after it is fully closed ie fully recirculating, you need to look elsewhere.


Blanking plug?

Does the dump valve have a "trumpet" on it? If so that is removed then the "plug" is put in it's place.
 
right i removed the trumpet of the dv and put the plug in,been out for around 2 hours in total and all was good, scaned it twice no codes and no issues.:D


then around 5 miles from home it happens again LIMPmode,scanned it and got the code 17535 but no 17705 pressure drop code?


please help guys i thought it was sorted,but looks asif its not?

thanks.