B1552: Trunk Release Solenoid Circuit Open
The B1552 code indicates that the Body Control Module (BCM) or rear door module has detected an open circuit in the decklid release solenoid or its power/control wiring. This prevents the electronic trunk release from working, though the mechanical key release typically still functions.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty decklid release solenoid (open coil)
- Damaged, cut, or corroded wiring between the BCM and solenoid
- Loose, disconnected, or damaged connector pins at the solenoid or BCM
- Blown fuse in the solenoid power circuit
- Internal BCM output driver failure
3. Symptoms You Will Notice
- Trunk will not open electronically (button or remote)
- Trunk can still be opened manually with the key
4. Step-by-Step Diagnosis
Check the trunk release fuse and replace if blown.
Inspect the solenoid connector and wiring for damage, corrosion, or loose connections.
Test the solenoid by applying 12V directly; if it doesn't click, replace the solenoid.
Measure voltage at the solenoid connector while pressing the release button; if no voltage, check wiring and BCM output.
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is safe to drive. The code does not affect engine or safety systems, but you will need to use the key to open the trunk.
How much does it cost to fix?▼
Repair costs typically range from $100 to $300, depending on whether the solenoid, wiring, or BCM needs replacement.