U0B37 - Understanding the Communication Error in 2015-2020 Chevrolet Silverado

Quick Answer

U0B37 means: U0B37 indicates a communication error between control modules in your vehicle.

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

Can I drive with U0B37? Immediate attention is recommended to prevent further complications.

Common Questions

What does U0B37 mean and how does it affect my car?

The U0B37 code signifies a communication error between control modules in your vehicle, which can lead to malfunction of essential systems, affecting safety and drivability. If left unaddressed, it could worsen over time, leading to extensive repairs.

What are the most common causes of U0B37 and how much does it cost to fix?

The common causes of U0B37 include faulty wiring (40% likelihood), failed control modules (30%), and software issues (20%). Repair costs can vary, with wiring repairs costing between $150 and $300, module replacements ranging from $600 to $1,200, and software updates costing around $100 to $200.

Can I drive my car with U0B37 or should I stop immediately?

It's advisable to stop driving your vehicle if you see the U0B37 code, as it indicates serious communication issues that could affect critical safety systems, leading to potential hazards on the road.

How can I diagnose U0B37 myself using GeekOBD APP?

To diagnose the U0B37 code using the GeekOBD APP, connect the app to your vehicle's OBD2 port, scan for codes, and review freeze frame data. Look for any other codes that may provide context and perform a visual inspection of wiring and connectors.

What vehicles are most commonly affected by U0B37?

The U0B37 code is frequently observed in the 2015-2020 Chevrolet Silverado and other GM vehicles. It's essential to check for any recalls or technical service bulletins (TSBs) related to this issue.

How can I prevent U0B37 from happening again?

To prevent U0B37 from recurring, ensure regular maintenance checks, keep wiring and connectors clean and dry, and consider software updates for your vehicle's control modules.

What is U0B37?

The diagnostic trouble code (DTC) U0B37 indicates a communication error between various control modules in your vehicle, particularly within the system that manages the vehicle's advanced features. This code is often seen in models like the 2015-2020 Chevrolet Silverado, as well as other GM vehicles. Essentially, U0B37 points to a failure in the communication network, which can lead to issues with systems such as the anti-lock brake system (ABS), electronic stability control (ESC), or other performance-related features. When this code is triggered, it may not only illuminate the check engine light but can also result in the malfunction of critical systems, affecting vehicle safety and performance. Drivers may notice erratic behavior from the vehicle, indicating that certain electronic systems are not functioning as intended. Ignoring this issue could potentially lead to more significant problems down the line, including reduced drivability, loss of functionality in safety features, and increased repair costs. Therefore, addressing this code promptly is crucial for maintaining the overall health and safety of your vehicle.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0B37 is present:

  • The check engine light remains illuminated, indicating that there is an issue that requires attention.
  • You may experience issues with advanced features such as lane assist or adaptive cruise control, which may not respond or operate correctly.
  • Drivers might notice that the vehicle's braking system behaves unpredictably, affecting overall safety and confidence during driving.
  • There may be intermittent warnings or alerts from the dashboard indicating malfunction in specific systems like ABS or ESC.
  • Reduced fuel efficiency, as the vehicle may not operate as efficiently when there are communication errors affecting engine management.

Possible Causes

Most common causes of U0B37 (ordered by frequency):

  1. {'cause': 'Faulty Wiring or Connectors', 'likelihood': '40%', 'details': 'Damaged or corroded wiring and connectors can disrupt communication between control modules.'}
  2. {'cause': 'Failed Control Module', 'likelihood': '30%', 'details': 'A malfunctioning control module, such as the ABS module, can cause U0B37 to trigger.'}
  3. {'cause': 'Software Issues', 'likelihood': '20%', 'details': 'Outdated or corrupt software in one of the control modules may lead to communication breakdowns. Regular updates can help prevent this.'}
  4. {'cause': 'Intermittent Electrical Connections', 'likelihood': '7%', 'details': 'Loose connections may cause temporary communication failures, making it essential to check all connectors during diagnostics.'}
  5. {'cause': 'Environmental Factors', 'likelihood': '3%', 'details': 'Moisture or extreme temperatures can affect electronic components and wiring, leading to issues.'}

U0B37 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing faulty wiring or connectors, which may involve splicing or replacing damaged sections.

  • Total: $150 - $300
  • Success rate: 90%
Control Module Replacement

Replacing a faulty control module, which may require programming to match the vehicle's specifications.

  • Total: $600 - $1,200
  • Success rate: 95%
Software Update

Updating the software of the control modules, which can resolve communication issues if they are software-related.

  • Total: $100 - $200
  • Success rate: 85%
Money-Saving Tips for U0B37
  • 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 U0B37 Diagnosis Process

Follow these systematic steps to accurately diagnose U0B37. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Perform a visual inspection of the vehicle's wiring and connectors for signs of damage, corrosion, or loose connections (5-10 minutes)

Step 1: Perform a visual inspection of the vehicle's wiring and connectors for signs of damage, corrosion, or loose connections (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 the GeekOBD APP to scan the vehicle's OBD2 system and retrieve all diagnostic trouble codes and freeze frame data (10-15 minutes)

Step 2: Use the GeekOBD APP to scan the vehicle's OBD2 system and retrieve all diagnostic trouble codes and freeze frame data (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: Test suspected components with a multimeter or specialized diagnostic tools to ensure they are functioning correctly (20-30 minutes)

Step 3: Test suspected components with a multimeter or specialized diagnostic tools to ensure they are functioning correctly (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 the proper operation of all affected systems after performing any repairs and clear the codes (10-15 minutes)

Step 4: Conduct a system function test to verify the proper operation of all affected systems after performing any repairs and clear the codes (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 repairs and ensure that no new codes appear (15-20 minutes)

Step 5: Perform a road test under various conditions to confirm the success of the repairs and ensure that no new codes appear (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: Wiring Repair on 2016 Chevrolet Silverado 1500

Vehicle: 2016 Chevrolet Silverado 1500, 75,000 miles

Problem: Customer reported multiple warning lights and erratic ABS behavior.

Diagnosis: Performed a visual inspection and found corroded connectors near the ABS module.

Solution: Replaced damaged connectors and cleaned the wiring harness.

Cost: $250 (labor and parts)

Result: All warning lights cleared, and ABS functionality returned to normal.

Case Study 2: Control Module Replacement on 2018 GMC Sierra

Vehicle: 2018 GMC Sierra, 50,000 miles

Problem: Customer experienced a check engine light and loss of traction control.

Diagnosis: Used GeekOBD APP to identify U0B37 and confirmed control module failure.

Solution: Replaced the ABS control module and reprogrammed it to the vehicle.

Cost: $1,000 (including parts and labor)

Result: Vehicle returned to full operational capacity, and no further issues reported after follow-up.

Diagnose U0B37

Use GeekOBD APP for professional diagnosis!

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  • Professional-grade analysis
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Code Information

Code: U0B37
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes