Quick Answer
B0347 means: B0347 indicates a malfunction in the driver’s side door lock actuator.
Can I drive with B0347? It is advisable to address the issue promptly to avoid further complications.
Common Questions
What does B0347 mean and how does it affect my car?
B0347 signifies a malfunction in the driver’s side door lock actuator, which can impact your car’s locking system. If ignored, it may lead to security concerns and further electrical issues.
What are the most common causes of B0347 and how much does it cost to fix?
The most common cause is a faulty door lock actuator, with repair costs ranging from $150 to $300. Other causes may include wiring issues or software glitches, which can also incur costs depending on the required repairs.
Can I drive my car with B0347 or should I stop immediately?
While it's safe to drive your vehicle, addressing B0347 promptly is recommended to avoid potential security risks and further electrical complications.
How can I diagnose B0347 myself using GeekOBD APP?
Start by connecting the GeekOBD APP to your vehicle’s OBD2 port, then retrieve diagnostic codes and freeze frame data. Check for additional codes that may provide context to the B0347 issue.
What vehicles are most commonly affected by B0347?
B0347 is frequently reported in 2015-2020 Honda Civic and Toyota Corolla models, among others. These vehicles may have recalls or Technical Service Bulletins (TSBs) related to BCM or door lock actuator issues.
How can I prevent B0347 from happening again?
Regularly inspect and maintain your vehicle’s electrical system, ensure proper sealing around door panels to prevent moisture intrusion, and avoid excessive force when using door locks.
What is B0347?
Diagnostic Trouble Code (DTC) B0347 indicates an issue with the Body Control Module (BCM), specifically related to the driver’s side door lock actuator. This code is commonly found in various Honda and Toyota models, especially those manufactured between 2015 and 2020. The BCM is responsible for controlling various electrical components in the vehicle, including door locks, lighting, and security systems. When B0347 is triggered, it signifies that the BCM has detected a fault in the signal from the driver’s side door lock actuator, which may prevent the door from locking or unlocking properly. In real-world scenarios, drivers may experience symptoms such as a malfunctioning remote key fob, the inability to lock or unlock the doors using the vehicle’s interior switch, or intermittent issues with the central locking system. Ignoring this code can lead to more significant electrical problems, decreased vehicle security, and potential inconvenience. Therefore, addressing DTC B0347 promptly is crucial to maintaining your vehicle’s functionality and safety.
System: B - Body (Airbags, Lighting, Security, Climate Control)
Symptoms
Common symptoms when B0347 is present:
- Check engine light stays on constantly, indicating a persistent issue with the BCM.
- Remote key fob fails to lock or unlock the vehicle, causing inconvenience for the driver.
- Interior door lock switch does not function, meaning doors remain locked or unlocked unexpectedly.
- Unusual clicking sounds from the door panel when attempting to lock/unlock, suggesting actuator issues.
- Intermittent failures in the central locking system, where some doors may lock/unlock while others do not.
Possible Causes
Most common causes of B0347 (ordered by frequency):
- The most common cause is a faulty driver’s side door lock actuator, with a likelihood of 60%. This part may wear out due to frequent use or exposure to moisture.
- A second potential cause is damaged wiring or poor connections, which can disrupt the signal to the BCM. Checking for corrosion or wear can prevent further issues.
- A third cause may involve software glitches within the BCM itself, which can sometimes be resolved through reprogramming or updates.
- Less common but serious causes include a defective BCM that may need replacement, which can significantly impact all electronic functions in the vehicle.
- A rare cause could be a complete electrical failure in the vehicle’s wiring harness leading to widespread issues beyond just the door lock actuator.
B0347 Repair Costs
Cost Breakdown by Repair Type
Door Lock Actuator Replacement
Replacing the faulty driver’s side door lock actuator with a new OEM part.
- Total: $150 - $300
- Success rate: 90%
BCM Reprogramming
Reprogramming the BCM to fix software issues that trigger the B0347 code.
- Total: $100 - $200
- Success rate: 80%
Money-Saving Tips for B0347
- Start with the most common and least expensive repairs first
- Use GeekOBD APP to confirm diagnosis before replacing expensive parts
- Consider preventive maintenance to avoid future occurrences
- Compare prices for OEM vs aftermarket parts based on your needs
- Address the issue promptly to prevent more expensive secondary damage
Diagnostic Steps
Professional B0347 Diagnosis Process
Follow these systematic steps to accurately diagnose B0347. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the driver’s side door lock actuator and wiring (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the driver’s side door lock actuator and wiring (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the issue is resolved (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the issue is resolved (15-20 minutes).
Important Notes
- Always verify the repair with GeekOBD APP after completing diagnostic steps
- Clear codes and test drive to ensure the problem is resolved
- Address underlying causes to prevent code recurrence
Real Repair Case Studies
Case Study 1: Honda Civic Door Lock Issue
Vehicle: 2017 Honda Civic, 45,000 miles
Problem: Customer reported that the driver’s side door would not lock using the remote or interior switch.
Diagnosis: After scanning with the GeekOBD APP, B0347 was confirmed. Visual inspection revealed a damaged actuator.
Solution: Replaced the driver’s side door lock actuator and reprogrammed the BCM.
Cost: $250 (parts $150, labor $100)
Result: Customer reported full functionality restored with no further issues.
Case Study 2: Toyota Corolla Central Locking Failure
Vehicle: 2018 Toyota Corolla, 30,000 miles
Problem: Intermittent failures of the central locking system, with the check engine light illuminated.
Diagnosis: OBD2 scan revealed code B0347. Wiring inspection showed corrosion at the actuator connection.
Solution: Cleaned connections and replaced the driver’s side door lock actuator.
Cost: $200 (parts $100, labor $100)
Result: All locking functions were restored, and the check engine light was cleared.