So I obtained one of those bluetooth OBD II readers. Plugged it in last night and ran [url="https://play.google.com/store/apps/details?id=org.prowl.torque&feature=search_result#?t=W251bGwsMSwxLDEsIm9yZy5wcm93bC50b3JxdWUiXQ.."]Torque[/url] on Android

Seems I have a few error codes. I'd love some help diagnosing them if anyone can help?

P0330 - [url="http://www.obd-codes.com/p0330"]Knock Sensor 2 Circuit (Bank 2)[/url] (Seems I just need to ensure the "B" knock sensor wiring is ok, then replace the sensor?)

U1900 - All I can find on this one is possibly "Can Communication Bus Fault"

U2197 - All I can find on this one is possibly "Invalid data for Vehicle Speed"

U2196 - All I can find on this one is possibly "Invalid data for Engine %h(RPM)"

B1250 - No idea?

Thanks