B3895 Buick Code - Deck Lid Ajar Siwtch Signal Circuit Low
Quick Answer
Rear compartment occupant sensor is connected to battery voltage and ground at all times. Common causes include Faulty Deck Lid Ajar Siwtch, Deck Lid Ajar Siwtch harness is open or shorted, Deck Lid Ajar Siwtch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B3895 Buick indicates Deck Lid Ajar Siwtch Signal Circuit Low.
- Common causes
- Common causes include Faulty Deck Lid Ajar Siwtch, Deck Lid Ajar Siwtch harness is open or shorted, Deck Lid Ajar Siwtch circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B3895 Buick Description
Rear compartment occupant sensor can be disabled by pressing disable switch on rear compartment occupant sensor and holding for 2 seconds. BCM will command trunk ajar telltale on for one minute with each ignition on signal while rear compartment occupant sensor is disabled. Once deck lid is opened, rear compartment occupant sensor will reset to on and resume normal operation. Rear compartment occupant sensor can also be enabled inside of rear compartment with ignition on or off by pressing disable switch. Deck lid ajar switch signal circuit is used for rear compartment occupant sensor class 2 data.
The Diagnostic Trouble Code (DTC) sets when BCM detects short to ground in trunk ajar switch signal circuit for greater than 2 seconds.
What are the Possible Causes of the DTC B3895 Buick?
- Faulty Deck Lid Ajar Siwtch
- Deck Lid Ajar Siwtch harness is open or shorted
- Deck Lid Ajar Siwtch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3895 Buick?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B3895 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B3895 Buick Code
1. What does the OBDII code B3895 mean on a Buick?
The code B3895 indicates a low signal in the Deck Lid Ajar Switch Signal Circuit, which is part of the system that monitors whether the trunk (deck lid) is closed or open.
2. What are the common symptoms of code B3895 in a Buick?
Symptoms may include a trunk ajar warning light on the dashboard, difficulty locking the trunk, or the trunk light staying on even when it’s closed.
3. What causes code B3895 to trigger on a Buick?
Common causes include a faulty deck lid ajar switch, damaged wiring or connectors in the circuit, or a malfunctioning body control module (BCM).
4. How can I diagnose the B3895 code on my Buick?
Start by visually inspecting the deck lid ajar switch and its wiring for damage. Use a multimeter to check for proper voltage and continuity in the circuit, and scan the BCM for additional related codes.
5. Can I still drive my Buick with the B3895 code active?
Yes, you can still drive the vehicle, but the trunk ajar warning may become a distraction, and the trunk light could drain the battery if it stays on.
6. How do I fix the B3895 code on a Buick?
Repairs may include replacing the deck lid ajar switch, repairing or replacing damaged wiring, or reprogramming/repairing the body control module if necessary.
7. How much does it cost to fix the B3895 code on a Buick?
Repair costs vary but typically range from $50 to $200, depending on whether the issue is with the switch, wiring, or BCM.
8. Can a dead battery cause the B3895 code to appear?
A dead or weak battery is unlikely to directly cause this code but could lead to electrical issues that might indirectly affect the circuit.
9. How do I reset the B3895 code on my Buick?
After fixing the issue, use an OBDII scanner to clear the code. If the problem persists, the code will reappear.
10. What happens if I ignore the B3895 code on my Buick?
Ignoring the code could lead to battery drain from the trunk light staying on, and you may lose the ability to monitor whether the trunk is securely closed.
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