B06B4 - Understanding B06B4 Code for 2015-2018 Honda Civic and Other Models

Quick Answer

B06B4 means: B06B4 indicates a malfunction in the rear liftgate lock actuator circuit.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with B06B4? It's advisable to address this code soon to maintain vehicle security and functionality.

Common Questions

What does B06B4 mean and how does it affect my car?

The B06B4 code indicates a problem with the rear liftgate lock actuator circuit. This could lead to issues with locking or unlocking your vehicle's rear hatch, affecting both security and convenience. If left unresolved, it may result in further electrical complications.

What are the most common causes of B06B4 and how much does it cost to fix?

The most frequent causes include a faulty liftgate lock actuator and damaged wiring. Repair costs can range from $50 for simple wiring repairs to $300 for actuator replacement, depending on the specific issue.

Can I drive my car with B06B4 or should I stop immediately?

While it may be safe to drive, it's wise to address B06B4 soon. Ignoring this code could compromise your vehicle's security as the liftgate might not function properly, increasing the risk of theft.

How can I diagnose B06B4 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for DTCs, view freeze frame data, and check the status of the liftgate lock actuator. This will help you identify whether the actuator is receiving power and functioning correctly.

What vehicles are most commonly affected by B06B4?

The B06B4 code is frequently reported in models like the 2015-2018 Honda Civic. It's worth checking for any recalls or technical service bulletins related to this code for these vehicles.

How can I prevent B06B4 from happening again?

Regular maintenance, including inspecting the liftgate mechanism and wiring for wear, can help prevent B06B4. Keeping the area clean and free of debris will also reduce the strain on the actuator.

What is B06B4?

The B06B4 diagnostic trouble code (DTC) refers to a specific issue within the vehicle’s body control module (BCM), particularly involving the rear liftgate lock actuator. When this code is triggered, it indicates that the BCM has detected a malfunction within the circuit that controls the rear liftgate lock actuator, which is responsible for locking and unlocking the rear hatch of your vehicle. This can lead to operational issues with the liftgate, such as it not locking or unlocking properly, which can affect your vehicle's security. In real-world scenarios, drivers may experience symptoms like the liftgate not responding when using the key fob or the interior button, which can be frustrating and inconvenient. Additionally, ignoring this code could result in more significant electrical issues down the line, as the BCM might be trying to compensate for a failing component. Commonly found in vehicles like the Honda Civic (2015-2018), this trouble code can arise due to a range of issues, including faulty wiring, a defective actuator, or problems within the BCM itself. It's essential to address this code promptly to ensure the safety and functionality of your vehicle.

System: B - Body (Airbags, Lighting, Security, Climate Control)

Symptoms

Common symptoms when B06B4 is present:

  • The check engine light may illuminate on your dashboard, indicating the need for further investigation.
  • You may notice that the rear liftgate does not lock or unlock when using the key fob, which can be a major inconvenience.
  • Drivers could experience intermittent functioning of the liftgate, where it locks or unlocks sporadically, making it unreliable for daily use.
  • In some cases, you might hear unusual clicking noises coming from the rear of the vehicle when attempting to operate the liftgate.
  • If the problem persists, it could lead to a complete failure of the liftgate mechanism, rendering it unusable.

Possible Causes

Most common causes of B06B4 (ordered by frequency):

  1. The most common cause of the B06B4 code is a faulty rear liftgate lock actuator, with a likelihood of about 60%. This component can wear out over time due to frequent use.
  2. A second common cause is damaged wiring or poor electrical connections in the actuator circuit, which could result from corrosion or wear and tear.
  3. Another potential cause is a malfunctioning body control module (BCM), which can lead to incorrect readings and actuator operation. Regular inspections can help prevent these issues.
  4. Less commonly, this code could be triggered by software glitches within the BCM, requiring a software update or reprogramming.
  5. A rare but serious cause could be a short circuit in the wiring harness, which could lead to further electrical problems if not addressed promptly.

B06B4 Repair Costs

Cost Breakdown by Repair Type

Rear Liftgate Lock Actuator Replacement

Replacing the faulty liftgate lock actuator with a new OEM part.

  • Total: $150 - $300
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring in the actuator circuit.

  • Total: $50 - $150
  • Success rate: 90%
Money-Saving Tips for B06B4
  • 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 B06B4 Diagnosis Process

Follow these systematic steps to accurately diagnose B06B4. 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 around the rear liftgate area (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion around the rear liftgate area (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context. This can help identify any additional issues (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the rear liftgate lock actuator and associated wiring

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the rear liftgate lock actuator and associated wiring. This ensures that power is reaching the actuator (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - After making any repairs, verify proper operation of the liftgate lock actuator and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - After making any repairs, verify proper operation of the liftgate lock actuator and clear codes using the GeekOBD APP (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm the repair success and ensure the liftgate functions correctly (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm the repair success and ensure the liftgate functions correctly (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

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: 2016 Honda Civic - Liftgate Lock Failure

Vehicle: 2016 Honda Civic, 45,000 miles

Problem: Customer reported that the rear liftgate would not lock with the key fob.

Diagnosis: Diagnosed with a faulty liftgate lock actuator after testing the circuit and verifying no power was reaching the actuator.

Solution: Replaced the rear liftgate lock actuator and cleared the DTC.

Cost: $250 (parts: $150, labor: $100)

Result: The liftgate operated correctly post-repair, and the customer was satisfied.

Case Study 2: 2017 Honda Accord - Intermittent Lock Issues

Vehicle: 2017 Honda Accord, 30,000 miles

Problem: Intermittent issues with the rear liftgate not responding to the key fob.

Diagnosis: Found damaged wiring in the actuator circuit causing intermittent issues.

Solution: Repaired the damaged wiring and tested the actuator for proper operation.

Cost: $120 (parts: $20, labor: $100)

Result: Liftgate functionality was restored, and the code did not return.

Diagnose B06B4

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: B06B4
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: MEDIUM
Category: Body Codes