Quick Answer
B1320 means: B1320 indicates a malfunction in the Body Control Module (BCM) of your vehicle.
Can I drive with B1320? It's advisable to address this issue soon to avoid further electronic malfunctions.
Common Questions
What does B1320 mean and how does it affect my car?
The B1320 code signifies an issue with your Body Control Module, which manages many of your vehicle's electronic systems. If this module is malfunctioning, you may experience problems with your power windows, locks, or interior lights, leading to inconvenience and potential safety issues.
What are the most common causes of B1320 and how much does it cost to fix?
Common causes include a faulty BCM, damaged wiring, or environmental factors like moisture. Repair costs can vary widely, typically ranging from $100 for simple wiring repairs to $800 for complete BCM replacement.
Can I drive my car with B1320 or should I stop immediately?
While it's not an immediate safety hazard, it's advisable to address the B1320 code soon. Ignoring it could lead to further electronic failures, potential battery drain, and more costly repairs down the line.
How can I diagnose B1320 myself using GeekOBD APP?
To diagnose B1320 with GeekOBD APP, start by scanning your vehicle for trouble codes. The app will provide you with details about the B1320 code, and you can check the freeze frame data to understand when the issue occurred. This will guide your next steps in troubleshooting.
What vehicles are most commonly affected by B1320?
The B1320 code is frequently seen in models like the 2006-2011 Honda Civic, 2010-2015 Toyota Corolla, and various other vehicles with complex electronic systems. Checking for recalls or service bulletins for your specific model can provide additional insights.
How can I prevent B1320 from happening again?
Regular maintenance, such as checking electrical connections, inspecting wiring for wear, and ensuring moisture does not infiltrate the BCM, can help prevent future occurrences of the B1320 code.
What is B1320?
The DTC B1320 code indicates a malfunction in the Body Control Module (BCM), which is responsible for controlling various electronic functions in your vehicle. This could include the power windows, door locks, interior lights, and even the vehicle's alarm system. When the BCM fails or encounters issues, it can lead to a range of problems, including non-functioning components or erratic behavior of electronic systems. For example, if you own a 2006-2011 Honda Civic or a 2010-2015 Toyota Corolla, you may notice that your power locks do not respond as expected or that the interior lights remain on even when the doors are closed. This code might not trigger the check engine light, but it can lead to significant inconveniences and safety concerns, particularly if essential functions like lights or locks fail to operate. Addressing a DTC B1320 promptly is crucial to maintain vehicle functionality and safety. Ignoring this code can lead to further complications, such as drained batteries or increased repair costs down the line, so understanding its implications is key for vehicle owners.
System: B - Body (Airbags, Lighting, Security, Climate Control)
Symptoms
Common symptoms when B1320 is present:
- The interior lights may stay on or fail to turn on, indicating a BCM issue.
- Power windows may not operate or respond erratically, affecting driver convenience.
- Door locks might not engage or disengage correctly, posing security risks.
- Dashboard warning lights could illuminate unexpectedly, hinting at underlying electronic issues.
- Battery drain may occur if the BCM is malfunctioning, leading to starting issues.
Possible Causes
Most common causes of B1320 (ordered by frequency):
- The most common cause is a faulty Body Control Module, which occurs in about 60% of cases. This can happen due to electrical shorts or physical damage.
- Another frequent culprit is damaged wiring or connectors, responsible for around 25% of issues. Corrosion or frayed wires can disrupt the BCM's communication.
- Environmental factors, such as moisture intrusion, can lead to BCM failures. Regular inspections can help prevent this.
- Less common but serious causes include fuse failures related to the BCM circuit, which should be checked during diagnostics.
- Rarely, software glitches within the BCM can trigger the B1320 code, necessitating a software update or reprogramming.
B1320 Repair Costs
Cost Breakdown by Repair Type
BCM Replacement
Replacing a faulty Body Control Module with a new unit.
- Total: $300 - $800
- Success rate: 85%
Repair Wiring/Connectors
Repairing damaged wiring or connectors that are affecting the BCM.
- Total: $100 - $300
- Success rate: 75%
Money-Saving Tips for B1320
- 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 B1320 Diagnosis Process
Follow these systematic steps to accurately diagnose B1320. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Conduct an initial visual inspection of the BCM and associated wiring for damage or corrosion (5-10 minutes)
Step 2: Use the GeekOBD APP to perform an OBD2 scan and retrieve all codes, including freeze frame data to see the fault context (10-15 minutes)
Step 3: Test suspected components with a multimeter or specialized diagnostic tool to confirm functionality (20-30 minutes)
Step 4: If repairs are made, conduct a system function test to verify correct operation and clear codes (10-15 minutes)
Step 5: Perform a road test under various conditions to ensure the issue is resolved and the BCM operates correctly (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: BCM Failure in 2008 Honda Civic
Vehicle: 2008 Honda Civic, 85,000 miles
Problem: Customer reported that the power locks were not functioning and interior lights remained on.
Diagnosis: Initial inspection revealed corroded connectors at the BCM. An OBD2 scan confirmed B1320 code.
Solution: Repaired the connectors and replaced the BCM.
Cost: $600 (parts: $400 for BCM, $200 for labor)
Result: Issue resolved; all electronic functions returned to normal.
Case Study 2: Electrical Issues in 2012 Toyota Corolla
Vehicle: 2012 Toyota Corolla, 50,000 miles
Problem: Customer experienced intermittent issues with power windows and dashboard lights.
Diagnosis: Diagnostic scan revealed B1320; wiring inspection showed damaged wires leading to the BCM.
Solution: Repaired the damaged wiring and reprogrammed the BCM.
Cost: $250 (parts: $50 for wiring, $200 for labor)
Result: Restored functionality, and the customer reported no further issues.