B2615 on 2013-2019 Cadillac XTS — Passenger Compartment Dimming 2 Circuit
1 vehicles · 1 makes · $150-$600 repair
Most Reported On
B2615 is an OBD-II diagnostic trouble code meaning “Passenger Compartment Dimming 2 Circuit.” General Motors body code. The body control module supplies battery voltage to the interior courtesy, dome, and reading lamps and sets B2615 when that circuit does not behave as commanded - typically a short to ground, a short to voltage, or an open in the dome/courtesy lamp control circuit, or a loss of battery supply to the BCM from the instrument panel fuse block. Symptoms are interior courtesy and dome lamps that stay off entirely, stay on constantly, or flicker, along with erratic interior illumination dimming. It does not trigger the check engine light or affect drivability. Exact set conditions vary by platform, so confirm against the service information for the specific year and model. This code is most commonly reported on 2013-2019 Cadillac XTS, with repair costs ranging from $150 to $600.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
B2615 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does B2615 mean?
B2615 stands for "Passenger Compartment Dimming 2 Circuit." General Motors body code. The body control module supplies battery voltage to the interior courtesy, dome, and reading lamps and sets B2615 when that circuit does not behave as commanded - typically a short to ground, a short to voltage, or an open in the dome/courtesy lamp control circuit, or a loss of battery supply to the BCM from the instrument panel fuse block. Symptoms are interior courtesy and dome lamps that stay off entirely, stay on constantly, or flicker, along with erratic interior illumination dimming. It does not trigger the check engine light or affect drivability. Exact set conditions vary by platform, so confirm against the service information for the specific year and model.
What are the most common causes of B2615?
The most common causes of B2615 are: Short to ground in the courtesy/dome lamp control wiring, Open circuit or broken wire between the BCM and the lamps, Circuit shorted to voltage, Blown fuse or loss of battery supply at the instrument panel fuse block feed to the BCM, Failed door jamb switch or corroded lamp socket, Faulty body control module (least common). The specific cause varies by vehicle.
How much does it cost to fix B2615?
Repair costs for B2615 range from $150 to $600, depending on the vehicle and root cause.
Which vehicles are affected by B2615?
Au7o has documented B2615 across 1 vehicle models from 1 manufacturers: Cadillac.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.