U0944 - Understanding DTC U0944: Common Issues in 2015-2017 Chevrolet Silverado and GMC Sierra

Quick Answer

U0944 means: DTC U0944 indicates a communication failure between the body control module and other control modules.

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

Can I drive with U0944? Immediate attention is recommended to prevent potential safety issues.

Common Questions

What does U0944 mean and how does it affect my car?

DTC U0944 indicates a communication error between the body control module and other modules in your vehicle. This can affect various functions, including power windows, lighting, and safety features. If left unchecked, these issues can lead to safety risks and impaired vehicle performance.

What are the most common causes of U0944 and how much does it cost to fix?

Common causes include faulty wiring connections (60% likelihood), malfunctioning body control modules (25%), and damaged connectors (10%). Repair costs can range from $150 to $1000, depending on the specific issue and necessary repairs.

Can I drive my car with U0944 or should I stop immediately?

While you may be able to drive your vehicle with DTC U0944, it is advisable to have it checked immediately. Ignoring this code could lead to malfunctioning safety features or other serious issues.

How can I diagnose U0944 myself using GeekOBD APP?

To diagnose U0944, connect your vehicle to the GeekOBD APP, run a full scan to retrieve all trouble codes, and review the freeze frame data for context. Check the communication status of the BCM and other modules for any inconsistencies.

What vehicles are most commonly affected by U0944?

Commonly affected vehicles include the 2015-2017 Chevrolet Silverado and GMC Sierra. These models often face this issue due to their reliance on the body control module for various electronic functions.

How can I prevent U0944 from happening again?

Regular vehicle maintenance, including checking electrical connections and avoiding aftermarket modifications, can help prevent DTC U0944. Keeping the vehicle's wiring clean and secure is also crucial.

What is U0944?

DTC U0944 is a diagnostic trouble code that indicates a communication error between the body control module (BCM) and other control modules in your vehicle. This code is most commonly found in models such as the 2015-2017 Chevrolet Silverado and GMC Sierra. When this code is triggered, it generally means that there's a disruption in the network that allows different modules to communicate effectively. For instance, if your vehicle has features that depend on communication between the BCM and other modules, such as automatic lights or power windows, you may experience issues with these features. The implications of this code can range from minor inconveniences, like a malfunctioning accessory, to more serious problems, such as safety features not working correctly. If left unresolved, the vehicle’s performance and functionality can degrade over time. To address DTC U0944, it's essential to perform a thorough diagnostic to pinpoint the specific communication breakdown, which could be due to faulty wiring, a malfunctioning module, or issues with connectors. Once identified, repairs may involve replacing components or repairing wiring to restore proper communication.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0944 is present:

Check engine light stays on constantly, indicating a persistent communication issue that needs addressing.
Power windows and mirrors may not function correctly, leading to driver frustration and potential safety concerns.
Dashboard warning lights may illuminate unexpectedly, causing confusion and concern for the driver.
Automatic lights may fail to turn on or off as needed, compromising visibility and safety during night driving.
Inconsistent operation of the vehicle's central locking system, which can lead to security concerns.

Possible Causes

Most common causes of U0944 (ordered by frequency):

{'cause': 'Faulty wiring connections', 'likelihood': '60%', 'details': 'Loose or corroded connections can disrupt communication between modules, leading to DTC U0944.'}
{'cause': 'Malfunctioning body control module', 'likelihood': '25%', 'technicalExplanation': 'If the BCM itself is faulty, it may fail to send or receive signals, triggering this DTC.'}
{'cause': 'Failed or damaged connectors', 'likelihood': '10%', 'preventionTips': 'Regularly inspect and maintain connectors, ensuring they are clean and secure to prevent corrosion.'}
{'cause': 'Aftermarket modifications', 'likelihood': '4%', 'details': "Adding aftermarket electrical components can interfere with the vehicle's network, resulting in communication problems."}
{'cause': 'Software issues', 'likelihood': '1%', 'details': 'Occasionally, a software glitch can prevent proper communication between modules, although this is less common.'}

U0944 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing or replacing damaged wiring connections related to the BCM.

Total: $150 - $400
Success rate: 80%

BCM Replacement

Replacing a malfunctioning body control module to restore proper communication.

Total: $500 - $1000
Success rate: 90%

Money-Saving Tips for U0944

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 U0944 Diagnosis Process

Follow these systematic steps to accurately diagnose U0944. 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).