code p1557

can anyone help? Code # P1557 from an actron cp1925 obd ll
turbo charger control limit exceded. i call to get this is from actron.. other info includes, (from autozone's pc data)
1 failed charge air pressure sensor
2 failed wastegate regulator valve
3 failed turbo.

i know it is not the turbo, the car run ok, slight lose of power at highway speeds 65plus, no smoke.

2000 tdi jetta with 260K.

thanks!

frequent causes include stiff or rusted out actuator, vacuum hoses, N75
below is from http://wiki.ross-tech.com/wiki/index.php/Category:Fault_Codes

17965/P1557/005463 - Charge Pressure Control: Positive Deviation
Possible Symptoms
Reduced power output
Limp mode
Possible Causes
Boost Pressure too High
Hoses/Pipes incorrect connected, disconnected, blocked or leaking
Charger Pressure Control defective
VNT (variable nozzle turbo): nozzles stuck
Solenoid Valve for Boost Pressure Control (N75) defective
Possible Solutions
Check Hoses/Pipes to/between Components
Check Solenoid Valve for Boost Pressure Control (N75)
Check / Clean / Replace Charge Pressure Control
Check / Clean mechanism for variable nozzles

Your 2000 shouldn't have a wastegate. The downfall of the generic scanners is lack of specificity.

Check this thread:
http://forums.tdiclub.com/showthread.php?t=222968

Unfortunately, the troubleshooting involves using vag-com, which it sounds like you don't have access to.

One thing to check/replace that is fairly inexpensive are vacuum lines, often the culprit and a good starting point if they have never been replace.

p1557

thanks, from the 2000 high milage tdi that was under maintained new to me and from a new-bee. i have a lot of info here to research and do. is there a discount tool and parts site you guys use? i did purchase a haynes manuel for a base line. i am a shadtree mechanic with a dodge cummins. i need to learn the terms as well as specifics on the site ie a4?? the intercooler is filthy with oil, a good place to start! i found this while looking for a wastegate reg valve that i don't have. THANKS!