B3808 Buick Code - Rear Door Lock Relay Circuit
Quick Answer
The Body Control Module (BCM) internally grounds the door lock relay control circuit for the rear door lock relay when it receives a class 2 message from the driver door module (DDM) or passenger door module (PDM). Common causes include Faulty Rear Door Lock Relay, Rear Door Lock Relay harness is open or shorted, Rear Door Lock Relay 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
- B3808 Buick indicates Rear Door Lock Relay Circuit.
- Common causes
- Common causes include Faulty Rear Door Lock Relay, Rear Door Lock Relay harness is open or shorted, Rear Door Lock Relay 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 B3808 Buick Description
What are the Possible Causes of the DTC B3808 Buick?
- Faulty Rear Door Lock Relay
- Rear Door Lock Relay harness is open or shorted
- Rear Door Lock Relay circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3808 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 B3808 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 B3808 Buick Code
1. What does the OBDII code B3808 mean on a Buick?
The B3808 code indicates a malfunction in the rear door lock relay circuit, which may affect the proper operation of the rear door locks.
2. What are the common symptoms of a B3808 code?
Symptoms may include rear door locks not functioning, intermittent locking/unlocking issues, or no response when using the key fob or door switches.
3. What causes the B3808 code to appear?
Common causes include a faulty rear door lock relay, damaged wiring or connectors in the circuit, or a failure in the Body Control Module (BCM).
4. How can I diagnose the B3808 code?
Check for loose or damaged wiring and connectors in the rear door lock relay circuit. Use a multimeter to test the relay and inspect the BCM for faults.
5. Can I still drive my Buick with a B3808 code?
Yes, you can drive your vehicle, but the rear door locks may not operate correctly, which could be a security concern.
6. How do I fix the B3808 code on my Buick?
Repairs may involve replacing the rear door lock relay, repairing damaged wiring or connectors, or reprogramming or replacing the BCM if necessary.
7. How much does it cost to repair a B3808 code?
The repair cost depends on the issue. Replacing a relay might cost $20–$50 for parts, while wiring repairs or BCM replacement could be more expensive.
8. Can I fix the B3808 code myself?
If you have basic electrical knowledge and tools, you can inspect and replace the relay or repair wiring. For BCM issues, professional assistance is recommended.
9. Will clearing the B3808 code fix the problem?
Clearing the code may temporarily remove the warning, but the underlying issue must be resolved to prevent the code from returning.
10. What tools are needed to troubleshoot a B3808 code?
You'll need an OBDII scanner, multimeter, and possibly wiring diagrams for your Buick to properly diagnose and repair the issue.
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