B1252 Code: Meaning, Causes, and Symptoms | OBD2 Codes
B1252 – USB Port Circuit Short to Ground
B1252 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B1252 Possible Causes
Faulty USB Cable and Port,USB Cable and Port harness is open or shorted,USB Cable and Port circuit poor electrical connection,Faulty Accessory Protocol Interface Module (APIM)
The media hub requires an external power and ground circuit to operate. Loss of power or ground disables all media hub functionality. One USB cable connects the media hub to the Accessory Protocol Interface Module (APIM). The OBDII code sets when the APIM detects an over-current condition in the USB circuit. This can be caused by a fault in the USB cable and port, or by the customer USB device.