I called an ASE-certified mechanic. He charged some $60 for the visit and $60 diagnosis and really he didn't quite spot on anything. Left me where I was - work-wise , diagnosis-wise and knowledge-wise. So I am reaching out to hopefully a more "pundit" community here.
I was driving up hill and suddenly at 2000 RPM , I got a CEL due to P1549 (Expanded to BOOST CONTROL VALVE).
I checked all the vacuum hoses. They were okay this time too.. they've now been checked a total of three times. And all three occasions were related to excessive power for uphill or whenever I sought extra speed by going beyond 3000 RPM. Typically, it will happen after about 150 miles of driving. I will clear it and continue to drive.
The turbo bypass valve is actually the forge kind of valve which has 2 rings or washers and a spring in it. The washers do not remain in the center but will fall down towards the inlet for the vacuum hose. I am not sure how they're supposed to be positioned in there and what their presence will make in terms of power.
Why am I getting this error and what should I do to fix it?
BOMK also - the wastegate is built into the turbo.
This is a SAAB 9-5 5 Speed 2000 2.3t wagon