Decklid Punch-Out Sensor Open Circuit
The decklid punch-out sensor detects whether your trunk lid is fully closed or has been opened/broken. When this sensor's electrical circuit is broken or disconnected, the ECU can't read its status and triggers this code.
The ECU monitors the voltage signal from the decklid punch-out sensor circuit. The sensor should pull the signal to ground when the lid is closed and release it when open. An open circuit means no voltage change is detected, indicating a broken wire, disconnected sensor, or failed switch.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Sensor Signal Voltage | 0V (closed) to 5V (open) | No signal detected or always high impedance |
| Circuit Resistance | <100 ohms when active | Infinite or >10k ohms (open circuit) |
Code B1496 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, B1496 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.