U0490 - Invalid Data Received from Body Control Module (BCM) in Common Vehicles

Quick Answer

U0490 means: U0490 indicates invalid data received from the Body Control Module.

Fix: Check and replace faulty components Cost: $300 - $700 Time: 90-180 minutes

Can I drive with U0490? It's advisable to have this checked soon to avoid potential electrical issues.

Common Questions

What does U0490 mean and how does it affect my car?

The U0490 code indicates that your car's Engine Control Module has received invalid data from the Body Control Module. This can affect various electronic systems in your vehicle, like lights and locks, potentially leading to further complications if not addressed. It's essential to get this checked to maintain your vehicle's reliability.

What are the most common causes of U0490 and how much does it cost to fix?

Common causes of U0490 include a faulty Body Control Module, damaged wiring, or software glitches. Repair costs can range from $100 for wiring repairs to $700 for a BCM replacement, depending on the specific issue and the vehicle model.

Can I drive my car with U0490 or should I stop immediately?

While you may be able to drive your car with the U0490 code, it's recommended to have it checked soon. Ignoring the code could lead to serious electrical issues that might compromise your vehicle's safety and functionality.

How can I diagnose U0490 myself using GeekOBD APP?

To diagnose U0490 using the GeekOBD APP, connect the app to your vehicle's OBD2 port. Retrieve and review diagnostic trouble codes, then check the freeze frame data to see the conditions under which the U0490 code was triggered. This information can guide your next steps for repairs.

What vehicles are most commonly affected by U0490?

The U0490 code is frequently seen in vehicles like the 2013-2018 Chevrolet Silverado and 2014-2017 GMC Sierra. Other makes may also experience this issue, especially those with complex electronic systems.

How can I prevent U0490 from happening again?

To prevent U0490, perform regular inspections of wiring and connections, keep software updated, and avoid aftermarket electrical modifications that could interfere with the vehicle's electronics.

What is U0490?

The Diagnostic Trouble Code (DTC) U0490 indicates that the Engine Control Module (ECM) has received invalid data from the Body Control Module (BCM). This code typically occurs in various makes and models, particularly in vehicles like the 2013-2018 Chevrolet Silverado and 2014-2017 GMC Sierra. The BCM is responsible for managing various electrical components in the vehicle, such as lights, locks, and other electronic systems. When the ECM detects a communication error with the BCM, it triggers the U0490 code. This can result in various symptoms, such as malfunctioning lights, issues with power windows, or even problems with the vehicle starting. The implications of this code can be serious, as it may lead to further electrical system failures if not addressed promptly. If left unresolved, the issue could escalate to more significant problems affecting vehicle performance, security features, and overall reliability. It's essential for vehicle owners to understand that while the U0490 code might not immediately affect drivability, it can lead to larger issues over time, necessitating quick attention from a qualified technician.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0490 is present:

  • Check engine light illuminates and stays on, indicating an underlying issue with the vehicle's electrical systems.
  • Malfunctioning electronic components such as power windows or door locks, leading to inconvenience and potential safety concerns.
  • Intermittent issues with lighting systems, where headlights or taillights may flicker or fail to operate correctly.
  • Inconsistent performance of keyless entry systems, causing frustration when trying to enter the vehicle.
  • Loss of functionality in dashboard indicators, impairing the driver's ability to monitor vehicle status effectively.

Possible Causes

Most common causes of U0490 (ordered by frequency):

  1. The most common cause of U0490 is a faulty Body Control Module (BCM), which is responsible for managing communication between various electronic components. This issue occurs in approximately 60% of cases.
  2. Another significant cause can be damaged wiring or poor connections between the ECM and BCM. Corrosion or wear can lead to communication failures, making up about 25% of reported issues.
  3. Software glitches in the BCM or ECM can also trigger this code. Regular updates and checks can prevent this, accounting for around 10% of occurrences.
  4. Less frequently, issues arise from a malfunctioning Engine Control Module (ECM), which may misinterpret the data received from the BCM, occurring in about 4% of cases.
  5. A rare cause might be related to external electrical interference from aftermarket accessories, which can disrupt communication channels, though this is seen in less than 1% of situations.

U0490 Repair Costs

Cost Breakdown by Repair Type

BCM Replacement

Replacing the Body Control Module to restore proper communication and functionality.

  • Total: $300 - $700
  • Success rate: 90%
Wiring Repair

Repairing damaged wiring or connections between ECM and BCM.

  • Total: $100 - $300
  • Success rate: 80%
Software Update

Updating the BCM or ECM software to eliminate glitches.

  • Total: $50 - $150
  • Success rate: 75%
Money-Saving Tips for U0490
  • 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 U0490 Diagnosis Process

Follow these systematic steps to accurately diagnose U0490. 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 suspected components, focusing on the BCM and related wiring (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, focusing on the BCM and related wiring (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 - Verify proper operation after repairs and clear codes to reset the system (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes to reset the system (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 repair success and ensure the code does not reappear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the code does not 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: 2015 Chevrolet Silverado - BCM Replacement

Vehicle: 2015 Chevrolet Silverado, 80,000 miles

Problem: Customer reported check engine light illuminated and malfunctioning power windows.

Diagnosis: OBD2 scanning revealed U0490 code. Visual inspection showed corroded connectors at the BCM.

Solution: Replaced the Body Control Module and cleaned all connections.

Cost: $650 (parts: $400 for BCM, labor: $250)

Result: After the repair, all electronic systems functioned properly, and the check engine light did not reappear.

Case Study 2: 2017 GMC Sierra - Wiring Repair

Vehicle: 2017 GMC Sierra, 50,000 miles

Problem: Driver experienced intermittent lighting issues and check engine light.

Diagnosis: Diagnostic scan revealed U0490. Wiring inspection showed fraying near the BCM.

Solution: Repaired damaged wiring and re-secured connections.

Cost: $200 (parts: $50 for connectors, labor: $150)

Result: Lighting issues resolved, and the code cleared after testing.

Diagnose U0490

Use GeekOBD APP for professional diagnosis!

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

Code: U0490
System: Network (Communication, CAN Bus)
Severity: MEDIUM
Category: Network Codes