Quick Answer

U0917 means: U0917 indicates a communication failure between vehicle modules.

Can I drive with U0917? Immediate attention is recommended to avoid safety issues.

Common Questions

What is U0917?

The U0917 diagnostic trouble code indicates a communication issue between the vehicle's modules, particularly related to the high-speed CAN (Controller Area Network) bus. This code typically suggests that the vehicle's body control module (BCM) is unable to communicate with another module on the network. This can lead to numerous problems, including malfunctioning electronic features such as power windows, door locks, and stability control systems. When U0917 appears, it usually means there's an interruption in data transmission, which could be caused by damaged wiring, a faulty module, or poor connections. Failure to address this code promptly could result in further electrical issues, potentially affecting vehicle safety and functionality. For instance, if the stability control module isn't receiving signals correctly, it may not activate during critical driving situations, which could increase the risk of accidents. It's essential for car owners, especially those with affected models like the 2016-2021 Chevrolet Silverado or GMC Sierra, to understand the implications of this code and seek professional diagnostics.

Symptoms

Common symptoms when U0917 is present:

• The check engine light may illuminate and stay on, indicating an issue with the vehicle's communication system.
• Drivers may notice that electronic features like power windows and door locks function intermittently or not at all, leading to frustration and safety concerns.
• Fuel economy may decrease due to improper functioning of electronic control systems, with reports of a 10-15% drop in efficiency.
• ABS warning light may activate, indicating that the anti-lock braking system is not functioning correctly, which can compromise vehicle safety.
• Unusual electrical behavior, such as flickering lights or erratic gauge readings, may occur as a result of disrupted communication.

Possible Causes

Most common causes of U0917 (ordered by frequency):

1. {'cause': 'Damaged wiring or connectors (70%) - This is the most common issue, often due to wear and tear or environmental damage, leading to poor connections.', 'details': 'Inspect wiring harnesses for frays or cuts, especially where they are exposed to moving parts or heat sources.'}
2. {'cause': "Faulty module (20%) - A malfunctioning module within the vehicle's network can prevent proper communication.", 'details': "Testing each module's functionality is crucial to identify if one needs replacement."}
3. {'cause': 'Corrosion at connectors (5%) - Rust or corrosion at connection points can disrupt signal transmission.', 'details': 'Regular maintenance and cleaning of electrical connections can prevent this issue.'}
4. {'cause': "Software issues (4%) - Occasionally, outdated software or firmware in the vehicle's modules can lead to communication errors.", 'details': "Updating the vehicle's software at a dealership may resolve the code."}
5. {'cause': 'Interference from aftermarket electronics (1%) - Improperly installed aftermarket accessories can interfere with the CAN bus.', 'details': 'Ensuring professional installation of aftermarket parts can help eliminate this risk.'}

U0917 Repair Costs

Diagnostic Steps

Real Repair Case Studies