What Does B2600 Mean?
This code indicates that the Body Control Module (BCM) has detected a mechanical or electrical failure in the double-locking door motor system. The motor has either seized mechanically, drawn excessive current indicating a stalled condition, or failed to respond to command signals. This affects the enhanced security feature that provides additional locking beyond the standard door lock mechanism.
Common Causes
45%
Seized or mechanically bound double-lock motor due to corrosion, debris, or internal wear
25%
Damaged or corroded wiring harness between BCM and door lock motor causing high resistance or short circuit
20%
Failed door lock linkage or mechanism binding preventing motor movement
10%
Faulty Body Control Module unable to properly control or detect motor operation
Diagnostic Steps
1
Step 1: Identify which door is affected using bi-directional controls in scan tool to command each double-lock motor individually. Listen for motor operation or binding noises at each door.
2
Step 2: Remove the affected door panel and visually inspect the double-lock motor, linkage, and mechanism for obvious binding, corrosion, broken components, or debris. Manually operate the lock mechanism to check for smooth movement.
3
Step 3: Disconnect the double-lock motor connector and measure resistance across motor terminals (typically 3-8 ohms). Also check for continuity to ground (should be open circuit). Check connector pins for corrosion or damage.
4
Step 4: With motor disconnected, use scan tool to monitor BCM commanded output while activating double-lock function. Using a multimeter, verify battery voltage is present at motor connector during activation (should show 12V+).
5
Step 5: If voltage is present but motor doesn't operate when connected, apply 12V directly to motor terminals from battery to confirm motor operation. If motor runs freely when removed from mechanism, check lock linkage for binding.
6
Step 6: After replacing faulty component, clear codes, cycle locks multiple times using both key fob and interior switch, then verify code does not return and all lock functions operate normally.
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) has detected a mechanical or electrical failure in the double-locking door motor system. The motor has either seized mechanically, drawn excessive current indicating a stalled condition, or failed to respond to command signals. This affects the ...
The most common cause of B2600 (Double Locking Door Motor Frozen) is: Seized or mechanically bound double-lock motor due to corrosion, debris, or internal wear
Typical repair costs for B2600 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive. This affects only the enhanced double-locking security feature while primary door locks continue to function normally. Repair at convenience, though vehicle security may be slightly compromised in areas where enhanced locking is necessary.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2600 to identify the root cause.
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Quick Info
Category
Body
System
Body Security and Access System
Difficulty
Type
Generic (SAE)
Recommended Tools
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