my car is throwing 00544, says boost spike???? n75 bad??? its the only code left!!! 1995 s6
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00544 Fault Code Meaning and potential solutions
Sorry. Didn't see this yesterday.
00544 Boost pressure to maximum exceeded
-Implausible signal
-Signal too large
Potential Causes:
-Ingress of air downstream of turbocharger
-Blow off valve faulty
-Solenoid valve for boost pressure limiter , N75 faulty
-Leak in vacuum line from inlet manifold to J220 ECU or is disconnected
-Pressure sensor (MAP sensor) in Motronic control unit J220 is faulty
Things to check:
-Check connections (mechanical and electrical), e.g. hose connections between N75 and Waste Gate, electrical connections to N75,
-Test blow off valve
-Test solenoid valve for boost pressure limiter N75
-Test boost pressure
N75 info: http://forums.quattroworld.com/s4s6/msgs/20987.phtml
BPV info: http://forums.quattroworld.com/s4s6/msgs/20994.phtml
MAP sensor info: http://forums.quattroworld.com/s4s6/msgs/20417.phtml
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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