How to use an obd scanner bluetooth

Seeing the check engine light turn on in a vehicle usually means it’s time for a test, or an onboard diagnostic (OBD). The best OBD2 scanner to use at home?
The Bluetooth OBDII Scan Tool runs a smartphone-based diagnostics test.

[@AlanAdams-w2w]

Wilson Jose Hernandez Kenneth Lee Christopher

[@eliaselkadi2891]

Hello friend, should i turn on the engine first or without turning on ?

[@lalim923]

Hi, Plug in OBD scanner first then turn on ignition but not start the engine. If plug in OBD scanner then start the car engine also no problem,

[@eliaselkadi2891]

@@lalim923 Thanks my friend 😘

[@hotchocolate9887]

Hi i'm using same app same obd... and it was working but now the app is saying that the obd is not connected with the ecu

[@DianneBrady-n6e]

Brown Robert Moore Donna Miller Jeffrey

[@patrickveerapin1586]

hi, not connecting, the light should be green or red on the OBD?