Trouble code P1391 means: Intermittent loss of CMP or CKP
Trouble code P0125 means:Insufficent coolant temperature for closed loop fuel control
"A diagostic" is a loose term for troubleshooting. It clearly depends on the trouble your having as to how you trouble shoot.
Trouble code P0730 means:Incorrect gear ratio
Trouble code P1361 means: TDC Sensor Intermittent Interruption
Trouble code P0301 means: Cylinder 1 Misfire Detected
Trouble code P0351 means: Ignition Coil A Primary/Secondary Circuit
Trouble code P0410 means:Secondary air injection system malfunction
Trouble code P0340 means:Camshaft position sensor circuit malfunction
Trouble code p1633 means: Vehicle Speed Signal
Trouble code P1676 means: TCM A/T FI data line circuit
Trouble code P0328 means: Knock sensor #1 circuit high input (Bank 1 or single sensor)