ODB-II code series PO7xx is global transmission. PO753 is probably a shift solenoid, but it depends on the specific car.
P1230
I'm not sure, but it seems to be is the number (Code) of Identification (ID) of a diagnostic exam (diagnosis). ID can also mean Integrated Diagnostics or Interfaced Diagnostics, hence it depends on context and where it is placed in the report.
I'll assume you got this code from the Cluster Diagnostics $9318 is Low Battery Voltage
For OBDII codes I normally just type The word "code" followed by the code into Google and get a useable answer in the first page of answers.
show me
The ECU fault code PO753 refers to the Transmission 3rd to 4th gear Shift Solenoid. This is part of the Transmission Relay Circuits. To repair this will require knowledge of the transmission. I suggest unless you are knowledgeable you take this to a transmission professional for repair.
Yes
Fault in EGR Diagnostics
You won't find a code book for that car. That car was built long before they had "on board diagnostics".
Trouble code P0740 means: A/T Torque Converter Clutch System Out of Range
If you mean obd, it stands for "On Board Diagnostics".