U06AF - Understanding the U06AF Code in 2015-2018 Chevrolet and GMC Models

Quick Answer

U06AF means: U06AF indicates a communication fault in the vehicle's control modules.

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

Can I drive with U06AF? Immediate attention is recommended to avoid further electrical failures.

Common Questions

What does U06AF mean and how does it affect my car?

The U06AF code points to a communication failure between your vehicle's control modules. This can lead to performance issues, such as reduced power and erratic electronic behavior. Ignoring it could result in serious complications, including total system failure.

What are the most common causes of U06AF and how much does it cost to fix?

Common causes include damaged wiring (40% chance), software issues, and faulty control modules. Repair costs vary, with wiring repairs costing around $150-$300, while control module replacements can run $500-$1,200.

Can I drive my car with U06AF or should I stop immediately?

While it may be possible to drive short distances, it's not recommended. Driving with this code can exacerbate the issue and lead to unsafe conditions, so addressing it promptly is crucial.

How can I diagnose U06AF myself using GeekOBD APP?

Using the GeekOBD APP, scan your vehicle for error codes, review freeze frame data, and check for any other faults that might provide context for the U06AF code.

What vehicles are most commonly affected by U06AF?

This code is commonly found in 2015-2018 Chevrolet and GMC models. Owners should be aware of relevant recalls or technical service bulletins that may address this issue.

How can I prevent U06AF from happening again?

Regularly inspect wiring and connectors, keep software updated, and ensure that your vehicle's electrical systems are well-maintained to prevent future occurrences of the U06AF code.

What is U06AF?

The U06AF diagnostic trouble code (DTC) indicates an issue with the vehicle's communication network, specifically related to a fault in the control module. This code often arises in 2015-2018 Chevrolet and GMC models, where the vehicle's various electronic systems communicate through a network called the Controller Area Network (CAN). When the U06AF code is triggered, it signifies that the powertrain control module (PCM) is unable to receive or send messages to another control module, potentially affecting vehicle performance. This can lead to several issues, including reduced engine efficiency, erratic behavior of electronic features, and illumination of warning lights on the dashboard. Ignoring this code can lead to more severe electrical problems, increased repair costs, and even a complete failure of vehicle systems if the communication issue persists. Therefore, it's essential for vehicle owners to address this code promptly to prevent further complications.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U06AF is present:

  • The check engine light remains on, indicating an underlying issue that requires immediate attention.
  • Drivers may experience a loss of power during acceleration, with the engine struggling to respond to throttle inputs.
  • Fuel economy may drop significantly, with reports of a decrease of 10-15% in affected vehicles.
  • Erratic behavior of electronic systems, such as windows or locks not functioning correctly, can occur.
  • The vehicle may experience intermittent stalling or failure to start, particularly after the vehicle has been running for a while.

Possible Causes

Most common causes of U06AF (ordered by frequency):

  1. The most common cause of the U06AF code is damaged wiring or connectors in the control module network, with a likelihood of about 40%. Regular inspections can help catch these issues early.
  2. Another frequent cause is software glitches within the control module itself, as seen in many models, which can often be resolved with a simple software update.
  3. Corrosion or poor connections at the diagnostic port can lead to intermittent communication problems, making this a common yet preventable issue.
  4. Less commonly, a failing control module may trigger the U06AF code, requiring replacement of the module to restore proper communication.
  5. In rare instances, environmental factors like moisture or extreme temperatures can impact module performance, necessitating additional protective measures.

U06AF Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing damaged wiring or connections in the control module network.

  • Total: $150 - $300
  • Success rate: 85%
Control Module Replacement

Replacing a faulty control module that has failed communication.

  • Total: $500 - $1,200
  • Success rate: 90%
Software Update

Performing a software update to fix glitches in the control module.

  • Total: $100 - $200
  • Success rate: 75%
Money-Saving Tips for U06AF
  • 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 U06AF Diagnosis Process

Follow these systematic steps to accurately diagnose U06AF. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct a thorough visual inspection of wiring and connectors for signs of damage, corrosion, or loose connections (5-10 minutes)

Step 1: Conduct a thorough visual inspection of 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 perform an OBD2 scan

Step 2: Use the GeekOBD APP to perform an OBD2 scan. Retrieve any stored codes and check freeze frame data for 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: Test suspected components using a multimeter to assess voltage and continuity

Step 3: Test suspected components using a multimeter to assess voltage and continuity. This can help pinpoint the source of the communication failure (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: After making repairs, perform a system function test to ensure all control modules are communicating correctly and clear any error codes (10-15 minutes)

Step 4: After making repairs, perform a system function test to ensure all control modules are communicating correctly and clear any error 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: Conduct a road test under various conditions to verify that the repairs were successful and no further issues arise (15-20 minutes)

Step 5: Conduct a road test under various conditions to verify that the repairs were successful and no further issues arise (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 for 2016 Chevrolet Silverado

Vehicle: 2016 Chevrolet Silverado, 75,000 miles

Problem: Customer reported check engine light and power loss during acceleration.

Diagnosis: Visual inspection revealed frayed wires in the control module harness.

Solution: Repaired the damaged wiring and secured all connectors.

Cost: $250 (including labor and parts)

Result: The check engine light was cleared, and vehicle performance returned to normal.

Case Study 2: Control Module Replacement on 2017 GMC Sierra

Vehicle: 2017 GMC Sierra, 60,000 miles

Problem: Customer experienced erratic electronic features and check engine light.

Diagnosis: Diagnostic scan identified U06AF and further tests indicated a failing control module.

Solution: Replaced the faulty control module with a new OEM part.

Cost: $1,000 (including labor)

Result: All electronic features functioned correctly post-repair, and the U06AF code was resolved.

Diagnose U06AF

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: U06AF
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes