2009 Audi A4 "p1556 tdi" Questions

...TDI - Sluggish with black smoke I had autozone read the codes and it came back P1556: defination: BBCharge pressure negative deviation explanation: BBexternal leak on intake or exaust side Probable ...

tdi rebuilt transmission .While on test drive started loosing power ..lots of black smoke ..ECL code p1556 worked fine before rebuild speed power./also brake peddle getting hard ....car races off when

2002 jetta rebuilt transmission then got code p1556 after test drive.Worked fine before rebuild engine check light...blacksmoke...no power...jerky ride at low speed sometimes I think you know, you ...

...P1556. 1. Cold Start injector N108 2. EGR vacuum regulator solenoid valve N18 3. Air conditioning compressor interrupt 4. Fuel cut off valve N109 5. Wastegate bypass regulator valve N75 for boost ...

...P1556 (boost control negative deviation, underboost), or P1557 (boost control positive deviation, overboost). Proper diagnosis with VW specific software is half the battle. The rest is methodical ...

P1556 Charge pressure control negative. Lt35 2.8 tdi 5 cyl. 2001. Loses power after about 10 mins of use. Switch engine off for a while and its ok again for 10 mins then loses power again.. fuel pump ...