B3387 Buick Code - Right Front Window Up Switch Circuit Low
Quick Answer
The window switch or window switch circuits that generate this Diagnostic Trouble Code (DTC) are built-in parts of the Driver Door Switch Assembly (DDSA). Common causes include Faulty Driver Door Switch Assembly (DDSA), Driver Door Switch Assembly (DDSA) harness is open or shorted, Driver Door Switch Assembly (DDSA) 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
- B3387 Buick indicates Right Front Window Up Switch Circuit Low.
- Common causes
- Common causes include Faulty Driver Door Switch Assembly (DDSA), Driver Door Switch Assembly (DDSA) harness is open or shorted, Driver Door Switch Assembly (DDSA) 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 B3387 Buick Description
What are the Possible Causes of the DTC B3387 Buick?
- Faulty Driver Door Switch Assembly (DDSA)
- Driver Door Switch Assembly (DDSA) harness is open or shorted
- Driver Door Switch Assembly (DDSA) circuit poor electrical connection
- Faulty Passenger Front Door Module (PDM)
- Faulty Driver Door Module (DDM)
How to Fix the DTC B3387 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 B3387 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 B3387 Buick Code
1. What does the OBDII code B3387 mean on a Buick?
B3387 indicates a "Right Front Window Up Switch Circuit Low," meaning the electrical circuit for the right front window up switch is experiencing low voltage or a malfunction.
2. What are the common symptoms of code B3387 in a Buick?
Symptoms include the right front window not rolling up, erratic window operation, or no response when pressing the window switch.
3. What causes the B3387 code on a Buick?
Common causes include a faulty window switch, damaged or corroded wiring, a malfunctioning window motor, or a poor ground connection.
4. How can I diagnose the B3387 code on my Buick?
Diagnosis involves checking the window switch for proper operation, inspecting wiring for continuity or damage, and testing the window motor for functionality.
5. Can a blown fuse cause the B3387 code in a Buick?
While unlikely, a blown fuse related to the window circuit could indirectly contribute to the issue. It’s worth checking the fuse box as part of the diagnostic process.
6. Is it safe to drive with the B3387 code active in my Buick?
Yes, it’s safe to drive, but the right front window may not function properly, which could be inconvenient or affect ventilation.
7. How do I fix the B3387 code on my Buick?
Repairs may include replacing the right front window switch, repairing or replacing damaged wiring, or fixing grounding issues in the circuit.
8. Can I reset the B3387 code without fixing the issue?
Clearing the code with a scan tool may temporarily remove it, but the code will likely return until the underlying issue is resolved.
9. How much does it cost to repair code B3387 on a Buick?
Costs vary depending on the issue, typically ranging from $50 to $300 for parts and labor, depending on whether it’s the switch, wiring, or motor.
10. Can the B3387 code indicate a problem with the BCM (Body Control Module)?
Although rare, a malfunctioning BCM could potentially contribute to this code. However, it’s more commonly related to the switch or wiring.
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