How to check available OBDII data?

To check or OBD data is available from OBD device, please do the following: 1.Send to device the command obdinfo. Response details: Returns OBD info. Protocol, VIN, AdaptiveTiming value, requested PID counter, OBD application state, available vehicle PIDs, mil status, number of DTCs For example: Protocol:6,VIN:WVWZZZAUZFW125650,TM:0,CNT:11,ST:PROTOCOL DETECTION,P1:0x98180001,P2:0x1,P3:0xE0800020,P4:0x0,Fuel:OFF,MIL:0,DTC:0,ID0 According to obdinfo response you can check available OBD parameters via OBD Pid Reader. OBD reader can be found here

Protocol:6 – specifies car supported protocol VIN:WVWZZZAUZFW125650 -specifies car vin number ST:PROTOCOLDETECTION- specifies OBD application state P1:0x98180001,P2:0x1,P3:0xE0800020,P4:0x0 - specifies available vehicle PIDs. These values specifies available parameters in car. If all pids values 0 (P1:0x0,P2:0x0,P3:0x0,P4:0x0), it means that OBD parameters is not readable. MIL:0 - mil status, indicates state of the led(0- OFF, 1-ON) DTC:0 - number of errors Please find additional information here: