What Does B2276 Mean?
DTC B2276 indicates the Body Control Module (BCM) has detected an electrical fault in the door lock control circuit. This occurs when the BCM identifies abnormal voltage, current, or resistance in the wiring or components responsible for operating the door lock actuators. The fault could be present in any door's lock mechanism, associated wiring harness, or the BCM's internal control circuitry.
Common Causes
35%
Damaged or corroded wiring harness between BCM and door lock actuator, including chafed insulation or broken wires in door jamb flex area
30%
Failed door lock actuator motor with internal short circuit or open winding
20%
Corroded or loose electrical connector at door lock actuator or BCM connection point
10%
Internal BCM failure in door lock control driver circuit
5%
Blown fuse or poor ground connection in door lock circuit
Diagnostic Steps
1
Step 1: Visually inspect all door lock actuator connectors and BCM connectors for corrosion, bent pins, moisture intrusion, or loose connections. Clean and secure all connections found.
2
Step 2: Using a digital multimeter, check continuity of wiring harness from BCM to each door lock actuator, paying special attention to flex areas in door jambs where wires commonly break. Expected reading: less than 5 ohms resistance per wire.
3
Step 3: Test door lock actuator operation by applying direct 12V power and ground to actuator terminals while disconnected from harness. Actuator should lock and unlock smoothly with polarity reversal. Current draw should be 2-6 amps during operation.
4
Step 4: With actuator connected, use multimeter to measure voltage at actuator connector while commanding lock/unlock function through scan tool's bidirectional controls. Should see battery voltage present during actuation.
5
Step 5: Check door lock circuit fuse for continuity and verify dedicated ground circuit has less than 0.5 ohms resistance to battery negative terminal.
6
Step 6: If all wiring, grounds, and actuators test good, suspect BCM internal fault. Verify by substituting known-good BCM or consulting TSBs for module software updates before replacement.
Estimated Repair Cost
$100 - $650
Parts + labor, varies by vehicle and location
DTC B2276 indicates the Body Control Module (BCM) has detected an electrical fault in the door lock control circuit. This occurs when the BCM identifies abnormal voltage, current, or resistance in the wiring or components responsible for operating the door lock actuators. The fault could be present ...
The most common cause of B2276 (Door Lock Control Circuit) is: Damaged or corroded wiring harness between BCM and door lock actuator, including chafed insulation or broken wires in door jamb flex area
Typical repair costs for B2276 range from $100 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive with this code. Primary concern is loss of power door lock functionality, which may affect security and convenience but does not impact vehicle operation or safety systems. Manual lock operation typically remains functional.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2276 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Security System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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