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Discussion Starter #1
1 Fault Found:

17958 - Charge Pressure: Control Deviation
P1550 - 35-10 - - - Intermittent

Readiness: 1 1 0 0 0

17958/P1550/005456
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1 17958/P1550/005456 - Boost Pressure Control Valve (N75): Control Deviation
1.1 Possible Symptoms
1.2 Possible Causes
1.3 Possible Solutions

17958/P1550/005456 - Boost Pressure Control Valve (N75): Control Deviation
Possible Symptoms
Irregular behavior
Reduced power output
Limp mode
Possible Causes
Hoses/Pipes incorrect connected, disconnected, blocked or leaking
Charger Pressure Control defective
Solenoid Valve for Boost Pressure Control (N75) defective
Turbocharger defective
Possible Solutions
Check Hoses/Pipes to/between Components
Check Charge Pressure Control
Check Solenoid Valve for Boost Pressure Control (N75)
Check turbocharger

my question is can a bad brake booster made this problem, coz i did notice air to my foot, and thast akward, and another thing the brakes are more heavy, can i just unplug the Vac Hose from the BBooster, and plugged whit anithing, check if that is the prob?
 

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VAG Error Code: 17958
EOBD II Error Code: P1550

Fault Location:
Turbocharger (TC) pressure - control difference

Possible Cause:
Intake/exhaust leak.
Hoses interchanged/not connected.
Manifold absolute pressure (MAP) sensor (G71).
Turbocharger (TC) wastegate regulating valve.
Turbocharger (TC) wastegate actuator.
Turbocharger (TC).

As taken from my http://www.myturbodiesel.com/forum/f9/free-eobd-ii-error-codes-software-2919/ ;)
 

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Discussion Starter #4
thanks for all ur suport, problem fixed, was lower the intercooler hose, came lose, so we putit back and problem solved, cleared the p1550 code and is like was before, i did notice the vacum hoses are very old, im goin to replace all vacum hoses very soon.
 
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