Door Latch Signal Failure Code B2601
The B2601 code indicates that the Body Control Module (BCM) or door control module did not receive the correct latch signal when the door was closed, causing the system to reverse its operation. This code specifically applies to power or assisted door latch systems, where a latch position switch must confirm that the door is fully closed and secured. Without this signal, the system cannot recognize the door's status, affecting features like power locks, alarm, and interior lights.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty or misadjusted latch switch
- Damaged, corroded, or loose wiring in the door harness
- Faulty power door lock actuator
- Internal failure in the Body Control Module (BCM)
- Mechanical obstruction in the latch mechanism
- Misaligned door or latch
3. Symptoms You Will Notice
- Door ajar warning light stays on
- Power locks do not function properly or reverse operation
4. Step-by-Step Diagnosis
Check for mechanical obstructions or misalignment in the door latch.
Inspect the door harness for damaged, corroded, or loose wires.
Test the latch switch for proper operation and adjustment.
Verify the power door lock actuator functions correctly.
If all else fails, test the BCM for internal faults.
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, but the door may not be fully secured, and features like power locks and alarm may not work. Have it inspected soon.
How much does it cost to fix?▼
Typically $100 to $400, depending on the cause. A latch switch replacement is on the lower end, while BCM replacement is higher.