What Does B1495 Mean?
This code indicates the Body Control Module (BCM) has detected a malfunction in the decklid (trunk lid) punch-out sensor circuit. This sensor monitors whether the trunk has been forcibly opened or compromised, typically as part of the vehicle's security and anti-theft system. The BCM has detected an open circuit, short circuit, or sensor signal that is out of the expected voltage range.
Common Causes
45%
Faulty or damaged decklid punch-out sensor due to corrosion, physical damage, or internal component failure
30%
Damaged, corroded, or disconnected wiring harness between the BCM and the decklid sensor
15%
Poor electrical connection at sensor connector due to corrosion, moisture intrusion, or loose pins
10%
Body Control Module internal circuit failure or software corruption affecting the sensor input circuit
Diagnostic Steps
1
Step 1: Perform a visual inspection of the decklid punch-out sensor location (typically inside the trunk lid near the latch mechanism) for physical damage, water intrusion, or obvious wiring damage. Check connector for corrosion, bent pins, or loose connection.
2
Step 2: Using a digital multimeter, backprobe the sensor connector and measure the reference voltage from the BCM (typically 5V or 12V depending on manufacturer). Verify power and ground circuits are within specification per manufacturer service manual.
3
Step 3: Disconnect the sensor and measure resistance across the sensor terminals with an ohmmeter. Compare readings to manufacturer specifications (typically between 500-5000 ohms for a functional sensor). Check for open or short circuit conditions.
4
Step 4: Inspect the wiring harness from the sensor through the trunk hinge area to the BCM for chafing, pinching, or breaks. Pay special attention to flex points where wires bend during trunk opening/closing. Perform continuity and resistance tests on each circuit.
5
Step 5: If all wiring and sensor test within specification, monitor the sensor signal voltage at the BCM connector with the sensor connected using live data on the scan tool while manually activating the sensor to verify proper signal transition.
6
Step 6: Clear the code and perform a functional test by cycling the trunk lid and monitoring for code return. If the code returns immediately with known good sensor and wiring, suspect BCM internal fault requiring module replacement or reprogramming.
Estimated Repair Cost
$120 - $450
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected a malfunction in the decklid (trunk lid) punch-out sensor circuit. This sensor monitors whether the trunk has been forcibly opened or compromised, typically as part of the vehicle's security and anti-theft system. The BCM has detected an...
The most common cause of B1495 (Decklid Punch-Out Sensor Circuit Failure) is: Faulty or damaged decklid punch-out sensor due to corrosion, physical damage, or internal component failure
Typical repair costs for B1495 range from $120 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code does not affect vehicle drivability or safety and the vehicle is safe to drive. The primary concern is the loss of security system functionality related to detecting forced trunk entry, which may affect theft deterrence and insurance claims in case of a break-in.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1495 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Security System
Difficulty
Type
Manufacturer
Recommended Tools
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