What Does B2374 Mean?
This code indicates a malfunction in the electrical circuit controlling the power sliding door detent or latch mechanism. The Body Control Module (BCM) has detected an abnormal voltage, current draw, or open/short circuit in the sliding door latch actuator circuit. This prevents proper engagement or disengagement of the door latch, affecting the power sliding door operation and potentially door security.
Common Causes
45%
Failed sliding door latch actuator motor or internal mechanical binding
30%
Damaged or corroded wiring harness between BCM and sliding door latch actuator
15%
Faulty sliding door latch switch or position sensor
10%
Body Control Module (BCM) internal driver circuit failure
Diagnostic Steps
1
Step 1: Perform visual and physical inspection of the sliding door latch actuator assembly for mechanical damage, binding, or debris. Manually operate the latch mechanism to check for smooth movement and proper engagement.
2
Step 2: Inspect the sliding door wiring harness, particularly at flex points between body and door, for chafing, pinching, corrosion, or broken wires. Check all connector terminals for corrosion, bent pins, or looseness.
3
Step 3: Using a digital multimeter, backprobe the latch actuator connector and measure voltage supply (should be battery voltage when commanded) and ground circuit continuity (less than 0.5 ohms to ground). Verify BCM is sending proper command signals.
4
Step 4: Disconnect the latch actuator and measure its resistance across motor terminals (typically 2-8 ohms). Apply direct battery voltage and ground to actuator motor to verify operation and listen for abnormal noise or binding.
5
Step 5: If all circuits and actuator test good, perform BCM diagnostic routines using manufacturer-specific software to test internal driver circuits and monitor real-time latch position sensor data.
6
Step 6: Clear codes, cycle the sliding door through complete open/close operations multiple times, and verify repair by confirming no code return and proper latch engagement in all positions.
Estimated Repair Cost
$150 - $850
Parts + labor, varies by vehicle and location
This code indicates a malfunction in the electrical circuit controlling the power sliding door detent or latch mechanism. The Body Control Module (BCM) has detected an abnormal voltage, current draw, or open/short circuit in the sliding door latch actuator circuit. This prevents proper engagement or...
The most common cause of B2374 (Power Sliding Detent (Latch) Circuit Failure) is: Failed sliding door latch actuator motor or internal mechanical binding
Typical repair costs for B2374 range from $150 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is generally safe to drive but the affected sliding door may not latch properly, creating a security risk and potential for the door to open unexpectedly while driving. Disable power door operation and manually secure the door until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2374 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Power Sliding Door System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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