U0877 - DTC U0877 - Lost Communication with Steering Control Module - Common in 2014-2019 Chevrolet Silverado and GMC Sierra

Quick Answer

U0877 means: U0877 indicates a communication failure between the ECM and the steering control module.

Fix: Check and replace faulty components Cost: $100 - $400 Time: 90-180 minutes

Can I drive with U0877? Immediate attention is recommended to avoid safety risks.

Common Questions

What does U0877 mean and how does it affect my car?

U0877 indicates that your vehicle's Engine Control Module (ECM) is unable to communicate with the steering control module, leading to potential steering difficulties and loss of electronic stability control. This can impact your car's handling, making it crucial to address promptly to ensure safety.

What are the most common causes of U0877 and how much does it cost to fix?

Common causes include damaged wiring (50% likelihood), a faulty steering control module (30%), and improper installation of aftermarket parts (15%). Repair costs can range from $100 for wiring repairs to $800 for module replacement.

Can I drive my car with U0877 or should I stop immediately?

Driving with U0877 is not recommended. The communication failure can lead to steering issues, making it unsafe. It's best to have the vehicle inspected by a professional as soon as possible.

How can I diagnose U0877 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for codes, view freeze frame data, and perform live data monitoring to assess the condition of the steering module and ECM, which can help pinpoint the issue.

What vehicles are most commonly affected by U0877?

U0877 is frequently reported in models like the 2014-2019 Chevrolet Silverado and GMC Sierra. Always check for any recalls or Technical Service Bulletins (TSBs) related to steering issues.

How can I prevent U0877 from happening again?

Regular maintenance, including inspecting wiring and connectors, is critical. Avoiding aftermarket modifications that aren't compatible with your vehicle can also help prevent communication issues.

What is U0877?

The U0877 diagnostic trouble code indicates a communication issue between the vehicle’s control modules, specifically involving the steering control module. This code signifies that the Engine Control Module (ECM) is unable to communicate with the steering module, which can lead to various issues affecting vehicle handling and safety. When the ECM cannot receive information from the steering control module, it may trigger warning lights on the dashboard, such as the 'Service Steering' light, and can affect essential functions like electronic stability control and power steering. In practical terms, if this issue arises, drivers may notice a stiff or unresponsive steering feel, especially during low-speed maneuvers. Ignoring this code can lead to further complications, including complete steering failure, which could result in a safety hazard. Therefore, understanding and addressing DTC U0877 promptly is crucial for maintaining optimal vehicle performance and safety.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0877 is present:

Check engine light illuminates, often accompanied by a 'Service Steering' warning light.
Difficulty steering, particularly at low speeds, making it feel heavier than usual.
Loss of electronic stability control, leading to decreased traction in slippery conditions.
Unresponsive power steering assist, requiring more effort to turn the steering wheel.
Unusual noises when turning the steering wheel, such as grinding or clicking sounds.

Possible Causes

Most common causes of U0877 (ordered by frequency):

{'description': 'The most common cause is damaged wiring or connectors in the steering system, with a likelihood of about 50%. Corrosion or fraying can interrupt the signal between modules.', 'likelihood': '50%'}
{'description': 'Another common cause is a faulty steering control module itself, which can fail due to manufacturing defects or wear over time.', 'likelihood': '30%'}
{'description': 'Improper installation of aftermarket components can lead to communication issues, so ensure that all components are correctly fitted and compatible with the vehicle.', 'likelihood': '15%'}
{'description': 'A less common but serious cause is a failing ECM, which can lead to widespread electronic issues throughout the vehicle.', 'likelihood': '4%'}
{'description': "Rarely, a software glitch in the vehicle's computer system can cause the U0877 code to trigger, often resolved through a software update.", 'likelihood': '1%'}

U0877 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing or replacing damaged wiring and connectors in the steering system.

Total: $100 - $400
Success rate: 85%

Steering Control Module Replacement

Replacing the faulty steering control module with a new or refurbished unit.

Total: $300 - $800
Success rate: 90%

ECM Replacement

In rare cases, replacing the ECM may be necessary if it is found to be defective.

Total: $500 - $1500
Success rate: 70%

Money-Saving Tips for U0877

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 U0877 Diagnosis Process

Follow these systematic steps to accurately diagnose U0877. 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, which can take about 5-10 minutes

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion, which can take about 5-10 minutes.