U06AB - Understanding U06AB Code in 2016-2020 Chevrolet Silverado and Other Models

Quick Answer

U06AB means: U06AB signifies a communication problem between vehicle control modules.

Fix: Check and replace faulty components Cost: $150 - $400 Time: 90-180 minutes

Can I drive with U06AB? Immediate attention is recommended to prevent further issues.

Common Questions

What does U06AB mean and how does it affect my car?

The U06AB code signifies a communication issue between critical control modules in your vehicle, notably the powertrain and body control modules. This can lead to various problems, including poor vehicle performance and malfunctioning electrical components. If left unresolved, it can escalate into more serious issues, affecting your vehicle's reliability and safety.

What are the most common causes of U06AB and how much does it cost to fix?

Common causes include faulty wiring, software glitches, and module failures. Repair costs can vary significantly, with wiring repairs costing around $150 to $400, software updates from $100 to $300, and module replacements ranging from $300 to $800 depending on the specific vehicle and parts required.

Can I drive my car with U06AB or should I stop immediately?

While it may be possible to drive with the U06AB code, it's not recommended. Ignoring this code could result in further damage to your vehicle's systems. If you experience any additional symptoms, such as irregular performance or electrical issues, it's best to seek professional assistance promptly.

How can I diagnose U06AB myself using GeekOBD APP?

To diagnose U06AB with the GeekOBD APP, start by connecting the app to your vehicle's OBD-II port. Retrieve the diagnostic codes and examine the freeze frame data to see when the code was triggered. Follow the suggested steps for further testing, such as checking wiring and module functionality.

What vehicles are most commonly affected by U06AB?

The U06AB code is frequently reported in models like the 2016-2020 Chevrolet Silverado, GMC Sierra, and other GM vehicles from this era. Be sure to check for any manufacturer recalls or technical service bulletins related to this code that may provide additional insight.

How can I prevent U06AB from happening again?

To prevent future occurrences of U06AB, perform regular maintenance checks on your vehicle's electrical systems, including battery health, wiring integrity, and module updates. Keeping the vehicle clean and free from corrosion will also help ensure reliable communication between components.

What is U06AB?

The U06AB diagnostic trouble code (DTC) indicates a communication issue with the vehicle's control modules, specifically regarding the powertrain control module (PCM) and the body control module (BCM). This code typically arises when the BCM fails to receive or send the correct data to the PCM, which can lead to various electrical and performance problems. Drivers may notice issues such as the check engine light illuminating, erratic behavior of electrical components, or even performance drops in fuel efficiency. It's crucial for owners of vehicles like the 2016-2020 Chevrolet Silverado, GMC Sierra, or similar models equipped with advanced electronic systems to address this issue promptly. Ignoring the U06AB code can lead to further complications, including potential damage to sensitive electronic components or systems that rely on proper communication. Addressing this issue involves thorough diagnostics, as it can stem from wiring issues, faulty connectors, or even software glitches that require reprogramming. In practical terms, resolving a U06AB code often involves a detailed inspection and may necessitate the use of specialized diagnostic tools like the GeekOBD APP to pinpoint the exact problem.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U06AB is present:

  • Check engine light stays on constantly, indicating a fault that needs attention.
  • Electrical components, such as power windows or locks, may operate erratically, causing inconvenience.
  • Engine hesitates during acceleration, reflecting potential performance issues tied to module communication.
  • Fuel economy decreased by 10-15%, noticeable in daily driving habits and contributing to higher fuel costs.
  • Frequent issues with the vehicle’s infotainment system, including connectivity problems and system freezes.

Possible Causes

Most common causes of U06AB (ordered by frequency):

  1. Faulty wiring or connectors: This is the most common cause, occurring in about 40% of cases, often due to wear or corrosion.
  2. Software glitches: Approximately 25% of U06AB codes arise from outdated or corrupted software in the BCM or PCM.
  3. Faulty control module: A failure in either the PCM or BCM can be responsible, which happens in about 20% of cases. Regular software updates can help prevent this.
  4. Electrical shorts: Although less common, shorts in wiring can cause communication failures, making up around 10% of cases.
  5. Battery issues: Rarely, low voltage or poor battery connections can trigger this code, highlighting the importance of regular battery checks.

U06AB Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing or replacing damaged wiring or connectors that affect module communication.

  • Total: $150 - $400
  • Success rate: 90%
Software Reprogramming

Updating or reprogramming the PCM or BCM to resolve software issues.

  • Total: $100 - $300
  • Success rate: 80%
Module Replacement

Replacing a faulty PCM or BCM if repair is not possible.

  • Total: $300 - $800
  • Success rate: 95%
Money-Saving Tips for U06AB
  • 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 U06AB Diagnosis Process

Follow these systematic steps to accurately diagnose U06AB. 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 PCM and BCM (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, focusing on the PCM and BCM (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 (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear 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: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (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 Silverado U06AB Code Resolution

Vehicle: 2018 Chevrolet Silverado 1500, 45,000 miles

Problem: Customer reported check engine light and intermittent electrical issues.

Diagnosis: Performed a visual inspection and found frayed wiring near the BCM. Scanned for codes using GeekOBD APP, confirming U06AB.

Solution: Repaired the damaged wiring and cleared the codes. Conducted a system function test to ensure normal operation.

Cost: $250 (wiring repair and diagnostics)

Result: Check engine light turned off and all electrical components functioned properly post-repair.

Case Study 2: GMC Sierra Software Update Fix

Vehicle: 2017 GMC Sierra 2500HD, 60,000 miles

Problem: Vehicle experienced random electrical component failures and check engine light was on.

Diagnosis: Used GeekOBD APP to retrieve codes, discovering U06AB. Checked wiring and connectors, all appeared fine.

Solution: Reprogrammed the BCM with updated software. Cleared the codes and verified operation.

Cost: $200 (software reprogramming)

Result: Electrical issues resolved, and the vehicle operated without any further problems.

Diagnose U06AB

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
Download GeekOBD APP Get MOBD Adapter

Code Information

Code: U06AB
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes