DTC B2648: Ambient Light Sensor Signal Short To Battery: Description

DTC B2648 indicates that ambient light sensor is shorted to battery. DTC B2648 will set when ALC option is enabled, Ignition 1 is active, and ambient light sensor analog input is 250 counts or more for 5 seconds.

When DTC B2648 is set, headlights will be on at reduced DRL intensity at night and SERVICE VEHICLE SOON indicator will illuminate. DTC B2648 can be cleared using scan tool, or history DTC will disappear after 100 ignition cycles if fault conditions do not reoccur.