U0672 - Communication Issue with Steering Control Module in 2015-2020 Chevrolet Silverado

Quick Answer

U0672 means: U0672 indicates a communication failure with the steering control module.

Fix: Check and replace faulty components Cost: $300 - $800 Time: 90-180 minutes

Can I drive with U0672? Immediate attention is needed to ensure safe vehicle operation.

Common Questions

What does U0672 mean and how does it affect my car?

The U0672 code signifies a communication failure with the steering control module. This can lead to heavy steering or unresponsive handling, significantly affecting vehicle performance and safety. Ignoring this code may result in more severe steering issues or complete loss of power steering assistance, making your vehicle harder to control.

What are the most common causes of U0672 and how much does it cost to fix?

Common causes of U0672 include a faulty steering control module, damaged wiring, or poor maintenance practices. Repair costs vary, with module replacement typically ranging from $300 to $800, while wiring repairs may cost between $100 and $300 depending on the extent of the damage.

Can I drive my car with U0672 or should I stop immediately?

It is not advisable to drive your car with a U0672 code. The communication issue could lead to steering failure, posing a significant safety risk. If you experience severe symptoms like heavy steering or strange noises, it is crucial to stop driving and seek professional diagnosis and repair.

How can I diagnose U0672 myself using GeekOBD APP?

To diagnose U0672 with the GeekOBD APP, first connect the device to your vehicle's OBD2 port. Use the app to scan for trouble codes and freeze frame data. Analyze the data to identify any inconsistencies or patterns that may point to the steering control module or associated wiring issues.

What vehicles are most commonly affected by U0672?

The U0672 code is frequently reported in vehicles such as the 2015-2020 Chevrolet Silverado, GMC Sierra, and other models from General Motors that utilize electronic power steering systems. If you own one of these vehicles, it's important to be aware of this code and its implications.

How can I prevent U0672 from happening again?

Preventative measures include regular maintenance checks on your steering system, ensuring that fluid levels are adequate, and inspecting wiring and connections for signs of damage. Using quality parts during repairs and addressing any warning lights promptly can also help prevent recurrence.

What is U0672?

The DTC U0672 code indicates a communication issue with the steering control module. This trouble code often arises in vehicles equipped with electronic power steering systems, particularly in popular models like the 2015-2020 Chevrolet Silverado. When the onboard diagnostic system detects that the steering control module is not responding correctly to commands from the vehicle's engine control unit (ECU), it triggers the U0672 code. This issue can manifest as a failure in steering responsiveness, leading to a potential compromise in vehicle handling and safety. Car owners may notice the steering feels unusually heavy or unresponsive, making driving difficult and potentially dangerous. Ignoring this code can lead to more severe problems, including failure of the power steering system altogether, which could require significant repairs or replacements. In the worst-case scenario, the vehicle’s ability to steer effectively could be severely compromised, creating a hazardous driving situation. Therefore, addressing the U0672 code as soon as it appears is crucial for maintaining optimal vehicle performance and safety.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0672 is present:

  • The check engine light may stay on constantly, indicating a persistent issue with the steering control system.
  • Drivers might experience heavy or unresponsive steering, making it hard to maneuver the vehicle, especially at low speeds.
  • A noticeable decrease in fuel economy may occur as the engine compensates for the malfunctioning steering system.
  • The vehicle may exhibit unusual noises when turning, such as grinding or clicking sounds, indicating possible mechanical failure.
  • In some cases, the steering wheel may vibrate or feel unstable during operation, leading to a lack of confidence while driving.

Possible Causes

Most common causes of U0672 (ordered by frequency):

  1. The most common cause is a faulty steering control module, which has a likelihood of about 60%. This can occur due to manufacturing defects or wear over time.
  2. Another likely cause is damaged wiring or connectors in the steering system. Corrosion or fraying can disrupt communication between modules, accounting for about 25% of cases.
  3. Poor maintenance practices, such as failing to keep the steering fluid topped up, can lead to overheating and damage to the steering module, making up approximately 10% of issues.
  4. Less common but serious causes include software glitches in the vehicle's ECU, which can prevent proper communication and require reprogramming.
  5. A rare cause is an internal failure of the power steering pump, which can lead to a complete loss of steering assist and is often accompanied by other symptoms.

U0672 Repair Costs

Cost Breakdown by Repair Type

Steering Control Module Replacement

Replacing the faulty steering control module with a new OEM part to restore proper communication.

  • Total: $300 - $800
  • Success rate: 90%
Wiring Repair

Repairing or replacing damaged wiring or connectors in the steering system to restore proper communication.

  • Total: $100 - $300
  • Success rate: 80%
Money-Saving Tips for U0672
  • 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 U0672 Diagnosis Process

Follow these systematic steps to accurately diagnose U0672. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection - Check for obvious signs such as damaged wiring, loose connections, or corrosion that could affect the steering control system (5-10 minutes)

Step 1: Conduct an initial visual inspection - Check for obvious signs such as damaged wiring, loose connections, or corrosion that could affect the steering control system (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 - Retrieve all diagnostic trouble codes and freeze frame data to better understand the fault context (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan - Retrieve all diagnostic trouble codes and freeze frame data to better 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: Test the steering control module and related components using a multimeter or specific diagnostic tools to verify voltage and signal integrity (20-30 minutes)

Step 3: Test the steering control module and related components using a multimeter or specific diagnostic tools to verify voltage and signal integrity (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: Perform a system function test to ensure all components operate correctly after repairs and clear any stored codes (10-15 minutes)

Step 4: Perform a system function test to ensure all components operate correctly after repairs and clear any stored 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 to confirm the success of the repairs, driving under various conditions to ensure the steering system is functioning properly (15-20 minutes)

Step 5: Conduct a road test to confirm the success of the repairs, driving under various conditions to ensure the steering system is functioning properly (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: Steering Module Replacement on 2018 Chevrolet Silverado

Vehicle: 2018 Chevrolet Silverado, 45,000 miles

Problem: Customer reported difficulty steering and a persistent check engine light.

Diagnosis: Diagnostic scan revealed the U0672 code. Visual inspection showed frayed wiring to the steering module.

Solution: Replaced the damaged wiring harness and the steering control module.

Cost: $750 (module: $600, labor: $150)

Result: Post-repair, the steering was responsive and the check engine light was cleared.

Case Study 2: Wiring Repair for 2016 GMC Sierra

Vehicle: 2016 GMC Sierra, 30,000 miles

Problem: Owner experienced heavy steering and noise during turns.

Diagnosis: U0672 code confirmed via OBD2 scan. Inspection revealed corrosion at the connector.

Solution: Cleaned the connector and repaired the wiring.

Cost: $150 (parts and labor)

Result: The vehicle exhibited smooth steering after the repair, and no further issues were noted.

Diagnose U0672

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: U0672
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes