B0D79 - Understanding and Resolving the B0D79 Code in Honda and Toyota Vehicles

Quick Answer

B0D79 means: The B0D79 code indicates a malfunction in the body control module related to the rear liftgate.

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

Can I drive with B0D79? Immediate action is recommended as this may affect vehicle security and functionality.

Common Questions

What does B0D79 mean and how does it affect my car?

The B0D79 code indicates a problem with the rear liftgate's control system. This can lead to issues with accessing your trunk and may pose security risks if the liftgate doesn't lock properly.

What are the most common causes of B0D79 and how much does it cost to fix?

Common causes include a faulty liftgate latch sensor and wiring issues, with repair costs typically ranging from $150 to $300 depending on the specific repairs needed.

Can I drive my car with B0D79 or should I stop immediately?

While you can drive with the B0D79 code, it is advisable to address it soon to avoid potential safety hazards, especially if the liftgate opens unexpectedly.

How can I diagnose B0D79 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan your vehicle for codes, check for freeze frame data, and perform a live data stream to monitor the liftgate system's performance.

What vehicles are most commonly affected by B0D79?

The B0D79 code is frequently reported in Honda CR-V models from 2016 to 2020 and Toyota RAV4 models from 2016 to 2021.

How can I prevent B0D79 from happening again?

Regular maintenance checks, including visual inspections of wiring and connections, can help prevent issues that lead to the B0D79 code.

What is B0D79?

The B0D79 diagnostic trouble code (DTC) relates to the body control module (BCM) in your vehicle, particularly indicating a fault with the rear liftgate or trunk. This code is common in several Honda models, such as the 2016-2020 Honda CR-V, and Toyota models, including the 2016-2021 RAV4. When the B0D79 code is triggered, it often suggests that the BCM has detected an issue with the rear liftgate's latch, which may cause the liftgate to malfunction. Symptoms include the liftgate not opening, closing improperly, or even activating randomly while driving or parked. Ignoring this code can lead to more severe electrical issues or even security problems, as the liftgate may not lock properly. In real-world scenarios, this can lead to inconvenience and potential loss of belongings if the trunk remains unsecured. Additionally, if the liftgate is part of a power system, it can drain the battery if left unresolved. Car owners should prioritize diagnosing and fixing this code to ensure the functionality of their vehicle's rear access and maintain security and reliability.

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

Symptoms

Common symptoms when B0D79 is present:

  • The liftgate does not open or close properly, making it difficult to access the trunk area.
  • The rear liftgate may open randomly or without command, posing a safety risk while driving.
  • Check engine light illuminated alongside the B0D79 code, indicating a broader electrical issue.
  • The key fob fails to operate the liftgate, suggesting a potential issue with the BCM or wiring.
  • Unusual noises coming from the rear liftgate area when attempting to operate it, indicating mechanical failure.

Possible Causes

Most common causes of B0D79 (ordered by frequency):

  1. The most common cause is a faulty rear liftgate latch sensor, which occurs in about 60% of cases and may need replacement.
  2. A short circuit within the wiring harness connected to the BCM is the second most common cause, often due to wear or damage over time.
  3. Corrosion on connectors, especially in regions with high humidity, can also lead to the B0D79 code; regular inspections can prevent this.
  4. Less commonly, a software glitch in the BCM can falsely trigger the code; a software update might be necessary.
  5. In rare cases, physical damage to the BCM from external impacts can cause the B0D79 code to appear.

B0D79 Repair Costs

Cost Breakdown by Repair Type

Rear Liftgate Latch Sensor Replacement

Replacing the faulty latch sensor that commonly triggers the B0D79 code.

  • Total: $150 - $300
  • Success rate: 90%
BCM Software Update

Updating the BCM software to fix potential glitches causing the code.

  • Total: $50 - $100
  • Success rate: 70%
Money-Saving Tips for B0D79
  • 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 B0D79 Diagnosis Process

Follow these systematic steps to accurately diagnose B0D79. 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).

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 (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).

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 latch sensor for continuity (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the rear liftgate latch sensor for continuity (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: Wiring harness verification - Inspect the wiring for shorts or damage, particularly near the liftgate (15-20 minutes)

Step 4: Wiring harness verification - Inspect the wiring for shorts or damage, particularly near the liftgate (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.
Step 5: Step 5: System function test - Verify proper operation after repairs and clear codes with the GeekOBD APP (10-15 minutes)

Step 5: System function test - Verify proper operation after repairs and clear codes with 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.

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: Rear Liftgate Malfunction in 2018 Honda CR-V

Vehicle: 2018 Honda CR-V, 45,000 miles

Problem: Customer reported that the liftgate would not open with the key fob or manually.

Diagnosis: After scanning the vehicle, B0D79 was found along with other codes. Visual inspection revealed a damaged latch sensor.

Solution: Replaced the rear liftgate latch sensor and cleared the codes.

Cost: $180 (sensor cost: $130, labor: $50)

Result: Liftgate function restored and customer satisfaction confirmed.

Case Study 2: Power Liftgate Issue in 2020 Toyota RAV4

Vehicle: 2020 Toyota RAV4, 30,000 miles

Problem: Customer noticed the liftgate opening randomly while parked.

Diagnosis: B0D79 was present along with a wiring fault detected during inspection.

Solution: Repaired the wiring harness and updated the BCM software.

Cost: $220 (wiring repair: $120, software update: $100)

Result: Liftgate operation normalized and no further issues reported.

Diagnose B0D79

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: B0D79
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes