OBD-II Model A printing wierd values

[NosRokanaske]

I just received the Model A OBD2 version. I uploaded the sample code and added in serial.println(value) so i can see what value is stored in value. When i look into the serial monitor i only see "ṗ" being displayed in the serial command. I tried converting using serial.println(value, DEC) and serial.println(value, HEX) and both of those still give me the same thing ecept there is occasionally a ! and # respectively. Any ideas why im getting such a weird output?

Here are my conenctions
Red - 5V
Black - GND
White - TX
Yellow - RX

[stanley]

While the OBD adapter is using the serial UART, you can't use serial monitor or add Serial.println and that will simply interferece with the data communication.