Decklid Punch-Out Sensor Battery Short
The trunk lid punch-out sensor's power supply has a short circuit, like a light switch with exposed wires touching each other. The ECU detects abnormal voltage on the sensor's battery circuit and triggers this fault.
The ECU monitors the 12V supply voltage to the decklid punch-out sensor circuit. It detects shorts by measuring continuity and voltage levels that drop abnormally low or become erratic. When the voltage signal deviates from normal operating range, a short circuit is flagged.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Battery supply voltage | 11.5-14.5V | Below 5V or erratic fluctuation |
| Circuit continuity resistance | Above 100 ohms | Below 10 ohms (short detected) |
Code B1497 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, B1497 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.