Dodge turbo question

If you turn your key on and of three times leaving it in the on position it will display any stored codes in the odometer window. You need to pause slightly in the on position each time. There are several lists in the internet that will tell you what the codes if any mean.

As far as your turbo, I've always gone by the "if its not rubbing metal to metal" its fine. The turbine actually spins supported by engine oil and pressure.