Is There Any Harm in me Leaving my Device Connected to the Vehicle OBDII Port Overnight?

    October 31st, 2018

    Pin 16 on the ODB-II connector is specified as "Battery Power" or "Battery Positive". There will always be 12v power between pin 4 and 16. The connector will always have power on these two pins regardless of the key position, and when you plug a device into the port it will have power and may come on by itself (many scanners/tuners do this).

    Was this article helpful?

    Send feedback

    Can’t find what you’re looking for?

    Our Technical Support team is here for you.

    Contact Support