code 34 tbs low

That is low voltage at the tubo boost sensor. Typically it is a wiring issue and it is often at the plug that plugs into the sensor, which is mounted to the intake manifold. Unplug it and look for corroded/damaged pins. Give each wire in the plug a good tug to make sure it's not broken at the end. If you pull a wire apart, you can get a harness repair end. If that's not it, trace the wires back to the ECM looking for damage along the way. Do the same thing at the ECM plug, check for corrosion and tug the wires.

Boost pressure sensor failures are possible, but I haven't seen it often, it's usually a wiring issue.