Quick Answer
U013A means: U013A indicates a loss of communication with the Body Control Module (BCM).
Can I drive with U013A? Immediate attention is recommended to avoid further electrical issues.
Common Questions
What does U013A mean and how does it affect my car?
The U013A code signifies a communication failure between your Body Control Module (BCM) and other modules. This can hinder the performance of several electrical systems including lights, windows, and security features. If unresolved, it may lead to more significant electrical issues.
What are the most common causes of U013A and how much does it cost to fix?
Common causes include damaged wiring, faulty BCM, or water intrusion. Repair costs can vary widely, from $100 for wiring repairs to $800 for BCM replacement, depending on the specific problem and vehicle model.
Can I drive my car with U013A or should I stop immediately?
While you may still drive your vehicle, it is advisable to address the U013A code as soon as possible. Continuing to drive can exacerbate underlying issues and lead to further complications with electrical systems.
How can I diagnose U013A myself using GeekOBD APP?
Using the GeekOBD APP, connect it to your vehicle's OBD2 port. Scan for DTCs and review the freeze frame data for context. Look for related codes that can provide insight into the communication issue.
What vehicles are most commonly affected by U013A?
The U013A code is frequently found in 2015-2020 Ford F-150 and Chevrolet Silverado models, among others. Check for any manufacturer recalls related to this code.
How can I prevent U013A from happening again?
Regular maintenance is key. Ensure that all electrical connections are clean and secure. Consider periodic inspections of the BCM area for signs of water damage or corrosion.
What is U013A?
The diagnostic trouble code (DTC) U013A indicates that there is a communication issue between the vehicle's control modules, specifically the Body Control Module (BCM) and another module, usually the Engine Control Module (ECM) or Transmission Control Module (TCM). This code can affect various systems in your vehicle, including lighting, power windows, and security systems. When the BCM cannot communicate properly, it may cause malfunctions in these systems, leading to problems like flickering lights, non-functioning power windows, or even security system failures. Drivers may notice that certain features like remote start or keyless entry are not working as expected. If left unresolved, the communication problem can escalate, potentially causing more extensive electrical issues. It's essential to address this code promptly to ensure all vehicle systems operate correctly and maintain safety on the road.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U013A is present:
- The check engine light illuminates along with other warning lights, indicating multiple system faults.
- Power windows may stop working intermittently, leading to driver frustration and inconvenience.
- Flickering dashboard lights or non-functional interior lights are common, which may suggest BCM malfunction.
- Remote keyless entry may fail to work, causing difficulty in locking or unlocking doors remotely.
- Engine start issues may occur; the vehicle might not respond when trying to start.
Possible Causes
Most common causes of U013A (ordered by frequency):
- The most common cause of U013A is a damaged wiring harness or loose connections, accounting for about 40% of cases. This may occur due to wear and tear or exposure to harsh conditions.
- A second cause could be a faulty Body Control Module itself, which may malfunction due to internal component failure or software issues, with a likelihood of about 30%.
- Another possible cause is water intrusion into the BCM area, which can happen due to leaks or poor weather sealing. To prevent this, regularly check seals and ensure proper drainage around the BCM.
- Less common but serious causes involve electrical shorts in the vehicle’s wiring, which can lead to multiple system failures and need immediate attention.
- Rarely, a factory recall or software update may be necessary, especially in newer models where manufacturers identify widespread issues.
U013A Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repairing or replacing damaged wiring and connections related to the BCM.
- Total: $100 - $300
- Success rate: 85%
BCM Replacement
Replacing a faulty Body Control Module with a new or refurbished one.
- Total: $300 - $800
- Success rate: 90%
Software Update
Update the BCM software if a known issue is identified by the manufacturer.
- Total: $50 - $150
- Success rate: 75%
Money-Saving Tips for U013A
- 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 U013A Diagnosis Process
Follow these systematic steps to accurately diagnose U013A. 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). Look under the dashboard and near the BCM.
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). Ensure that all modules are checked for additional codes.
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, especially the BCM and wiring harness (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, especially the BCM and wiring harness (20-30 minutes).
Step 4: Step 4: System function test - After repairs, verify the proper operation of all systems connected to the BCM and clear codes (10-15 minutes)
Step 4: System function test - After repairs, verify the proper operation of all systems connected to the BCM and clear codes (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success, checking for any recurring symptoms (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success, checking for any recurring symptoms (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: Ford F-150 BCM Communication Issue
Vehicle: 2017 Ford F-150, 45,000 miles
Problem: Customer reported that the remote start feature was not working and the check engine light was on.
Diagnosis: After using the GeekOBD APP, the U013A code was retrieved along with other related codes indicating BCM issues. A visual inspection revealed a damaged wiring harness.
Solution: Replaced the damaged wiring and reconnected all relevant modules. Cleared the codes.
Cost: $250 (parts and labor breakdown included)
Result: Customer reported successful remote start and no further issues after the repair.
Case Study 2: Chevrolet Silverado Keyless Entry Failure
Vehicle: 2019 Chevrolet Silverado, 30,000 miles
Problem: Vehicle owner noted that the keyless entry system was malfunctioning, and dashboard lights were flickering.
Diagnosis: Diagnostic scan revealed U013A along with a faulty BCM code. Inspection showed signs of moisture around the BCM.
Solution: Replaced the BCM and resealed the area to prevent future water intrusion.
Cost: $650 (parts and labor detailed)
Result: After the repair, all systems functioned properly, and the customer was satisfied.