U0313 - Understanding the Invalid Data Received from Body Control Module

Quick Answer

U0313 means: U0313 indicates invalid data from the body control module, affecting vehicle functions.

Fix: Check and replace faulty components Cost: $300 - $600 Time: 90-180 minutes

Can I drive with U0313? Immediate attention is recommended to avoid further issues.

Common Questions

What does U0313 mean and how does it affect my car?

The U0313 code signifies that your vehicle's ECM has received invalid data from the BCM, potentially causing issues with various electrical systems. This can lead to warning lights, malfunctioning accessories, and decreased vehicle performance. If ignored, it may result in more severe electrical failures.

What are the most common causes of U0313 and how much does it cost to fix?

Common causes include communication errors due to loose connections or damaged wiring, which can cost between $100 to $600 to fix. Software glitches in the BCM are also prevalent, with repair costs around $50 to $150 for updates. Addressing these issues early can help prevent larger electrical problems.

Can I drive my car with U0313 or should I stop immediately?

While you may be able to drive your vehicle with a U0313 code, it is not advisable to ignore it. Continued driving can worsen the electrical issues and lead to safety concerns. It's best to have the vehicle inspected and repaired as soon as possible.

How can I diagnose U0313 myself using GeekOBD APP?

To diagnose U0313, connect the GeekOBD APP to your vehicle's OBD-II port. Use the app to scan for DTCs and access freeze frame data, which offers insights into recent vehicle behavior. Check for any additional codes that may provide context to the U0313 issue.

What vehicles are most commonly affected by U0313?

U0313 is frequently reported in models such as the 2016-2020 Chevrolet Malibu and the 2014-2019 Ford Fusion. Always check for recalls or technical service bulletins (TSBs) related to your specific vehicle make and model to stay informed.

How can I prevent U0313 from happening again?

To prevent U0313, perform regular maintenance checks on your vehicle's electrical systems. Ensure that all connections are secure and clean, avoid unnecessary modifications to electrical systems, and consider having software updates performed at your dealership to keep the BCM functioning optimally.

What is U0313?

The diagnostic trouble code (DTC) U0313 indicates that the vehicle's engine control module (ECM) has received invalid or corrupted data from the body control module (BCM). This issue often arises due to communication errors within the vehicle's network, particularly in systems that depend on data sharing between the ECM and BCM. Commonly found in vehicles like the 2016-2020 Chevrolet Malibu and the 2014-2019 Ford Fusion, U0313 can manifest in various ways, potentially affecting vehicle performance, safety features, and overall driver experience. If left unaddressed, it may lead to additional electrical issues, as the BCM controls numerous functions like lighting, locks, and security systems. As a car owner, you may notice symptoms such as warning lights on the dashboard, malfunctioning accessories, or even erratic vehicle behavior. It's crucial to diagnose and rectify this issue promptly to maintain the reliability and safety of your vehicle. Ignoring a U0313 code can lead to more significant problems down the line, making it essential to understand its implications thoroughly.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0313 is present:

  • Check engine light illuminates, remaining on until the issue is resolved.
  • Erratic vehicle behavior, such as unexpected locking or unlocking of doors during operation.
  • Malfunctioning electrical components, like windows or mirrors not responding as expected.
  • Dimming or flickering dashboard lights, indicating potential electrical issues.
  • Reduced functionality of safety features, such as traction control or stability control systems.

Possible Causes

Most common causes of U0313 (ordered by frequency):

  1. The most common cause of U0313 is a communication error between the ECM and BCM, occurring in about 65% of cases, often due to loose connections or damaged wiring.
  2. Another cause can be software glitches in the BCM, which can lead to corrupted data being sent, accounting for roughly 25% of cases. Regular software updates may mitigate this risk.
  3. Improper installation of aftermarket accessories or modifications can also trigger U0313, with about 5% of cases arising from this issue. Make sure to use professional installation services.
  4. Less common but serious causes include a faulty BCM that needs replacement, which can pose significant electrical issues if not addressed.
  5. Rarer causes include interference from other electronic devices or systems in the vehicle, which may disrupt the data transmission.

U0313 Repair Costs

Cost Breakdown by Repair Type

BCM Replacement

Replacing the body control module, especially if it's faulty or outdated.

  • Total: $300 - $600
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring or connectors between the ECM and BCM.

  • Total: $100 - $300
  • Success rate: 90%
Software Update

Updating the BCM software to the latest version to resolve communication errors.

  • Total: $50 - $150
  • Success rate: 70%
Money-Saving Tips for U0313
  • 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 U0313 Diagnosis Process

Follow these systematic steps to accurately diagnose U0313. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection for damaged wiring, loose connections, or corrosion at the connectors (5-10 minutes)

Step 1: Conduct an initial visual inspection for damaged wiring, loose connections, or corrosion at the connectors (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: Use a scan tool like the GeekOBD APP to retrieve all codes and freeze frame data, helping to understand the fault context (10-15 minutes)

Step 2: Use a scan tool like the GeekOBD APP to retrieve all codes and freeze frame data, helping 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: Perform component testing on the BCM and ECM using a multimeter or specific diagnostic tools to check for functionality (20-30 minutes)

Step 3: Perform component testing on the BCM and ECM using a multimeter or specific diagnostic tools to check for functionality (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: Conduct a system function test to verify proper operation after repairs and clear codes to see if they return (10-15 minutes)

Step 4: Conduct a system function test to verify proper operation after repairs and clear codes to see if they return (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: Perform a road test under various conditions to confirm the success of the repair and that no codes reappear (15-20 minutes)

Step 5: Perform a road test under various conditions to confirm the success of the repair and that no codes reappear (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: Chevrolet Malibu U0313 Repair

Vehicle: 2018 Chevrolet Malibu, 45,000 miles

Problem: Customer reported that the check engine light was illuminated and the power windows were malfunctioning.

Diagnosis: After running a diagnostic with the GeekOBD APP, the U0313 code was confirmed. A visual inspection revealed corroded wiring connections.

Solution: Replaced the damaged wiring and updated the BCM software. Cleared the codes and conducted a successful road test.

Cost: $350 (including parts and labor)

Result: All functions restored, and no codes returned after follow-up.

Case Study 2: Ford Fusion U0313 Diagnosis

Vehicle: 2015 Ford Fusion, 60,000 miles

Problem: Customer experienced intermittent electrical failures and dashboard warning lights.

Diagnosis: Diagnosis with the GeekOBD APP identified U0313. Further investigation showed a faulty BCM.

Solution: Replaced the BCM and reprogrammed it to the vehicle. Conducted a full system check afterward.

Cost: $500 (parts and labor)

Result: Vehicle returned to normal operation with all systems functioning correctly.

Diagnose U0313

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: U0313
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes