What Does B2573 Mean?
B2573 indicates the Body Control Module (BCM) has detected an electrical fault in the hatch release switch circuit. This occurs when the BCM identifies an open circuit, short to ground, short to power, or abnormal resistance in the wiring or switch that controls the rear hatch/liftgate release mechanism. The system monitors the switch input signal and sets this code when values fall outside expected parameters.
Common Causes
35%
Faulty hatch release switch with internal open circuit or degraded contacts
30%
Damaged or corroded wiring harness between BCM and hatch release switch, often from water intrusion or physical damage
20%
Corroded or loose connector at the hatch release switch or BCM causing intermittent connection
10%
Failed Body Control Module internal switch input circuit
5%
Blown fuse or damaged circuit protection device in hatch release switch power supply
Diagnostic Steps
1
Step 1: Perform visual inspection of the hatch release switch, connectors, and wiring harness for obvious physical damage, corrosion, water intrusion, or loose connections. Check fuse box for blown fuses related to hatch/liftgate release system.
2
Step 2: Using a digital multimeter, test the hatch release switch continuity by disconnecting the switch connector and measuring resistance across switch terminals while activating the switch (should read near 0 ohms when closed, infinite ohms when open).
3
Step 3: With ignition on and switch connector disconnected, backprobe the harness connector to verify reference voltage (typically 5V or 12V depending on system design) is present at the appropriate terminal from the BCM.
4
Step 4: Measure resistance of the wiring harness between the hatch release switch connector and BCM connector (with both disconnected). Compare readings to vehicle specifications, typically should be less than 5 ohms for continuity and greater than 10k ohms to ground.
5
Step 5: If wiring and switch test normally, use scan tool to monitor hatch release switch input status in BCM live data while activating the switch to verify BCM is receiving proper signal change.
6
Step 6: Replace faulty component (switch, repair wiring, or clean connectors as needed), clear codes, cycle the hatch release switch multiple times, and verify code does not return and function is restored.
Estimated Repair Cost
$75 - $350
Parts + labor, varies by vehicle and location
B2573 indicates the Body Control Module (BCM) has detected an electrical fault in the hatch release switch circuit. This occurs when the BCM identifies an open circuit, short to ground, short to power, or abnormal resistance in the wiring or switch that controls the rear hatch/liftgate release mecha...
The most common cause of B2573 (Hatch Release Switch Circuit) is: Faulty hatch release switch with internal open circuit or degraded contacts
Typical repair costs for B2573 range from $75 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this only affects convenience features for opening the rear hatch/liftgate. Repair at your convenience, though loss of remote hatch release function may be inconvenient and could compromise security if hatch cannot be properly latched or released.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2573 to identify the root cause.
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Quick Info
Category
Body
System
Body Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
