What Does B1552 Mean?
B1552 indicates the Body Control Module (BCM) has detected an open circuit in the decklid (trunk) release actuator circuit. This means electrical continuity has been lost between the BCM and the trunk release solenoid/actuator, preventing the trunk from being released electronically via the interior button, key fob, or external switch. The BCM monitors this circuit and sets this code when it cannot complete the circuit path to ground or power.
Common Causes
45%
Broken or corroded wiring between BCM and decklid release actuator, often at trunk hinge flex point
30%
Failed decklid release actuator/solenoid with open internal coil
15%
Disconnected or corroded connector at trunk release actuator
10%
Failed BCM internal trunk release driver circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of trunk release actuator/solenoid and connector for obvious damage, corrosion, or disconnection. Check connector pins for bent/corroded terminals and ensure fully seated.
2
Step 2: Using a digital multimeter, check for battery voltage at the actuator connector when trunk release is activated. If no voltage present, trace wiring harness back toward BCM checking for breaks or damage, especially at trunk hinge flex point.
3
Step 3: Disconnect actuator and measure resistance across actuator solenoid terminals. Typical resistance should be 3-20 ohms; infinite resistance indicates open coil and failed actuator requiring replacement.
4
Step 4: If actuator tests good and voltage is present, check ground circuit continuity from actuator ground to chassis ground. Resistance should be less than 1 ohm; repair ground connection if high resistance found.
5
Step 5: If all wiring and actuator test good, suspect BCM internal driver circuit failure. Verify BCM connector terminals are clean and tight, then consider BCM replacement or professional diagnosis.
6
Step 6: After repair, clear codes, cycle trunk release function multiple times, and verify code does not return. Test all trunk release methods (interior button, key fob, exterior button).
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
B1552 indicates the Body Control Module (BCM) has detected an open circuit in the decklid (trunk) release actuator circuit. This means electrical continuity has been lost between the BCM and the trunk release solenoid/actuator, preventing the trunk from being released electronically via the interior...
The most common cause of B1552 (Decklid Release Circuit Open) is: Broken or corroded wiring between BCM and decklid release actuator, often at trunk hinge flex point
Typical repair costs for B1552 range from $75 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this is a convenience feature only. The trunk can typically still be opened manually from inside the vehicle using the emergency release handle or mechanically with the key. Repair at convenience unless trunk security is a concern.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1552 to identify the root cause.
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Quick Info
Category
Body
System
Body Control System - Trunk Release
Difficulty
Type
Manufacturer
Recommended Tools
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