Fault Codes and Limp Mode

[javedsaleem]

I have a 2004 Galaxy 1.9 TDi Zetec with AUY Engine

Initially, it used to go into limp mode quite often, whilst on the Motorway, but this reduced dramatically. It now only happens once on every trip. Apart from that, vehicle is fine.

I get the get the following fault codes :-

17965/P1557/005463 - Charge Pressure Control: Positive Deviation
17964/P1556/005462 - Charge Pressure Control: Negative Deviation

According to Ross-Tech it could be one of 3 things:-
Charger Pressure Control defective
VNT (variable nozzle turbo): nozzles stuck
Solenoid Valve for Boost Pressure Control (N75) defective

I do not think any of the hoses or pipes have a leak or are blocked.

Any suggestions as to what it may be, how I can fix it and the best process to follow.

[Grant2012]

Use the search instead of being lazy hundreds of posts about that and all the info you need already posted