What Does B2594 Mean?
This code indicates that the Body Control Module (BCM) detected a powered liftgate, tailgate, or sliding door received an unlatch command and the latch released, but the door did not physically move to the open position. The BCM monitors position sensors and expects movement after the latch mechanism disengages during a power-operated opening sequence. This suggests a mechanical binding issue, motor failure, or sensor malfunction in the power closure system.
Common Causes
35%
Mechanical binding or obstruction in door tracks, hinges, or struts preventing movement after unlatch
30%
Failed or weak power door motor unable to move door after unlatching
20%
Faulty door position sensor providing incorrect feedback to BCM
10%
Latch mechanism partially seized or not fully releasing despite electrical signal
5%
Wiring harness damage or connector issues between motor and BCM
Diagnostic Steps
1
Step 1: Perform visual inspection of the power door tracks, hinges, and struts for physical damage, debris, corrosion, or binding. Manually operate the door through full range of motion to identify resistance points or unusual noise
2
Step 2: Access BCM live data and monitor door position sensor values while manually moving the door slowly through its full travel. Verify sensor voltage or percentage changes smoothly from 0-100% without dropouts or erratic readings
3
Step 3: Disconnect power door motor connector and use a multimeter to check for battery voltage (typically 12V) at motor supply during a power open command. If voltage present, apply direct power to motor terminals to verify motor operation and rule out motor failure
4
Step 4: Inspect latch mechanism operation by triggering unlatch function while observing latch release. Check for complete disengagement and verify latch moves freely without binding. Lubricate or replace latch if sticking detected
5
Step 5: Check wiring harness from door to body for pinched, chafed, or broken wires especially at hinge flex points. Wiggle test connectors while monitoring live data for intermittent connection issues
6
Step 6: Clear codes, perform power door initialization/relearn procedure per manufacturer specifications, then cycle door multiple times to verify repair. Monitor for code return and proper door movement through complete open/close cycles
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) detected a powered liftgate, tailgate, or sliding door received an unlatch command and the latch released, but the door did not physically move to the open position. The BCM monitors position sensors and expects movement after the latch mechanis...
The most common cause of B2594 (No Movement Detected After an Unlatch During Power Open) is: Mechanical binding or obstruction in door tracks, hinges, or struts preventing movement after unlatch
Typical repair costs for B2594 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but power door operation is compromised. Manual door operation may still be possible. Repair soon to prevent further damage to motor or latch components and restore convenience features.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2594 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Power Closure System
Difficulty
Type
Generic (SAE)
Recommended Tools
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