SparkFun OBD-II UART arduino nano VIN Code

Hello,

I try the example to get VINCODE of OBD but i don’t get full VIN code, it missed the last 4 characters (only 13 characters display). Do you know where is the problem please?

https://www.sparkfun.com/products/9555

i use this function:

bool COBD::getVIN(char* buffer, byte bufsize)

Thank you.

Any idea?