Decklid Release Circuit Open
The trunk/decklid release circuit isn't completing its electrical path, like a broken light switch that can't turn on the lights. The ECU detects no current flow when it tries to trigger the trunk release solenoid.
The body control module sends a voltage signal to the trunk release solenoid and monitors the circuit for proper current draw. If the ECU detects no current flow or excessive resistance for longer than a calibrated threshold, it sets the fault code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Current Draw | 2-5 amps when activated | 0 amps or no response detected |
| Circuit Voltage | 12V supply with path to ground | Open circuit or voltage drop exceeds threshold |
Code B1552 is a low-severity fault. Your vehicle is generally safe to drive to a workshop for diagnosis. However, do not ignore it indefinitely — low-severity codes often indicate developing problems that become expensive if neglected. Book a diagnostic appointment within 2–4 weeks. If you notice any additional symptoms (rough running, power loss, unusual smells), treat it as higher priority.
Once the fault is repaired, B1552 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.