Maximum number PIDs that can be configured through the OBD port

[Vasanthi91]

Hello,

Is there a limit on the number of PIDs that can be added while collecting the data? I was not able to add more than 7. It seems to have an issue communicating once I added more than 7 PIDs. I also tried editing the buffer size in the readPID function.

Please let me know if anyone faced this issue before and what can be done about it.

Thank you
vasanthi

[stanley]

There is a limit on multiple reading (should be 6). You can read additional PIDs one by one.

[td1973]

Vasanthi91 wrote:
> Is there a specific way to figure out the available PIDs in a vehicle?

You can send the 0100 request which will produce a response from the PCM/ECU.