B1495 – Decklid Punch-Out Sensor Circuit Failure

The ODBII code B1495 indicates a malfunction in the decklid punch-out sensor circuit, which is responsible for detecting the position or status of the decklid (trunk) in a vehicle.

The severity of ODBII code B1495 is generally considered moderate.

Common Causes For: B1494 Ignition Cylinder Sensor Ground Short

• Faulty decklid punch-out sensor
• Damaged wiring or connectors
• Short circuit in the sensor circuit
• Open circuit in the sensor circuit
• Corrosion at the sensor or connector
• Malfunctioning body control module (BCM)

Common misdiagnosis for B1495 Decklid Punch-Out Sensor Circuit Failure

• Faulty decklid latch
• Wiring issues or shorts in the harness
• Malfunctioning body control module (BCM)
• Incorrectly installed or damaged decklid
• Issues with the trunk release mechanism
• Faulty or misaligned decklid sensors
• Problems with the vehicle’s central locking system

Common Troubleshooting Steps

The OBD-II code B1495 refers to a “Decklid Punch-Out Sensor Circuit Failure.” This code typically indicates an issue with the sensor that detects whether the decklid (trunk) is open or closed. Here are some common troubleshooting steps to diagnose and potentially resolve this issue:

• Check the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information about the decklid punch-out sensor, including its location and wiring diagram.
• Visual Inspection: Inspect the wiring and connectors associated with the decklid punch-out sensor for any signs of damage, corrosion, or loose connections.
• Ensure that the sensor itself is securely mounted and not physically damaged.
• Test the Sensor: Use a multimeter to test the resistance and voltage of the sensor. Compare the readings to the specifications provided in the service manual.
• If the sensor is a switch type, check if it opens and closes properly when the decklid is operated.
• Check for Short Circuits: Inspect the wiring harness for any shorts to ground or other wires that could cause a circuit failure.
• Use a multimeter to check for continuity in the wiring.
• Inspect the Body Control Module (BCM): The BCM may be responsible for processing the signal from the decklid punch-out sensor. Check for any fault codes related to the BCM.
• If necessary, reprogram or replace the BCM according to the manufacturer’s guidelines.
• Clear the Codes: After performing any repairs or adjustments, clear the OBD-II codes using a scan tool and take the vehicle for a test drive to see if the code returns.
• Check Related Systems: Sometimes, issues with other systems (like the alarm system or trunk release) can affect the decklid sensor. Ensure that these systems are functioning correctly.
• Consult a Professional: If the issue persists after performing the above steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model.
• Replace the Sensor: If all tests indicate that the sensor is faulty, replacing the decklid punch-out sensor may be necessary.
• Recheck for Codes: After repairs or replacements, always recheck for any stored codes to ensure that the issue has been resolved. By following these steps, you should be able to diagnose and potentially fix the issue related to the B1495 code. Always ensure safety precautions are taken when working on vehicle electrical systems.