U0967 - Communication Error in Vehicle Control Modules - Common in 2016-2021 Chevrolet Silverado

Quick Answer

U0967 means: U0967 indicates a communication error between vehicle control modules.

Fix: Check and replace faulty components Cost: $100 - $500 Time: 90-180 minutes

Can I drive with U0967? Immediate attention is recommended to prevent further issues.

Common Questions

What does U0967 mean and how does it affect my car?

U0967 indicates a communication error between vehicle control modules. This can lead to issues such as rough shifting, decreased fuel efficiency, and dashboard warning lights. Over time, if not addressed, it may lead to more serious problems like complete module failure.

What are the most common causes of U0967 and how much does it cost to fix?

Common causes include faulty wiring, defective control modules, and software glitches. Fixing wiring can range from $100 to $500, while replacing a control module can cost between $300 and $1,200. Software updates are generally more affordable, costing $50 to $150.

Can I drive my car with U0967 or should I stop immediately?

While you may be able to drive your vehicle, it is not advisable to ignore the U0967 code. Doing so could lead to worsening performance and safety issues. It's best to have it diagnosed and repaired promptly.

How can I diagnose U0967 myself using GeekOBD APP?

To diagnose U0967 with GeekOBD APP, connect the app to your OBD2 port, read the fault codes, and check the freeze frame data. This will give you insight into when and how the error occurred, helping you understand the problem better.

What vehicles are most commonly affected by U0967?

U0967 is commonly seen in models like the 2016-2021 Chevrolet Silverado, 2015-2019 GMC Sierra, and 2017-2020 Cadillac Escalade. Always check for any recalls or Technical Service Bulletins (TSBs) related to communication issues.

How can I prevent U0967 from happening again?

To prevent U0967, ensure regular maintenance of electrical systems, including checking wiring and connectors for damage. Additionally, avoid installing aftermarket devices that could interfere with electrical systems. Regular software updates from the dealer can also help.

What is U0967?

The diagnostic trouble code (DTC) U0967 indicates a communication error between vehicle control modules, particularly in models like the 2016-2021 Chevrolet Silverado. This code typically signifies that one module is unable to communicate with another, which can lead to various performance issues. When the vehicle's onboard diagnostics detects this issue, it triggers the check engine light, potentially affecting systems such as the engine control unit (ECU) and transmission control unit (TCU). The implications of this error can range from minor inconveniences like inaccurate fuel gauge readings to significant performance degradation, including rough shifting or unresponsive throttle. Proper diagnosis is crucial, as ignoring the U0967 code may lead to further complications, including increased wear on components and even complete control module failure over time. It’s essential for vehicle owners to understand that while the vehicle may still be operational, the underlying issues could worsen, leading to more extensive repairs and higher costs down the line. Addressing U0967 promptly can save time and money by preventing more significant problems from developing.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0967 is present:

  • Check engine light stays on constantly, indicating that the vehicle's onboard diagnostics has detected a fault.
  • Engine hesitates during acceleration, which may cause a sluggish response from the throttle, making driving frustrating.
  • Fuel economy decreased by 10-15%, as the vehicle may not be operating efficiently due to communication errors.
  • Transmission shifts become erratic, leading to harsh or delayed shifting which can affect drivability and safety.
  • Dashboard warning lights may illuminate, including those for traction control, stability control, and anti-lock braking systems.

Possible Causes

Most common causes of U0967 (ordered by frequency):

  1. Faulty wiring or connectors between control modules (40% likelihood) - Often, the wiring harness can wear down or become damaged, causing communication failures.
  2. Defective control module (30% likelihood) - A specific control module, such as the ECU or TCU, may malfunction and fail to send or receive signals.
  3. Software glitches (20% likelihood) - Outdated software versions can cause compatibility issues between modules, leading to communication errors.
  4. Less common but serious cause: Corrosion on connectors - While less frequent, corrosion can disrupt electrical signals and should be inspected regularly.
  5. Rare but possible cause: Electrical interference from aftermarket devices - Improperly installed aftermarket accessories can interfere with the vehicle's communication systems.

U0967 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing or replacing damaged wiring or connectors between control modules.

  • Total: $100 - $500
  • Success rate: 85%
Control Module Replacement

Replacing faulty control module with a new or refurbished unit.

  • Total: $300 - $1,200
  • Success rate: 90%
Software Update

Updating the software in the vehicle's control modules to resolve communication issues.

  • Total: $50 - $150
  • Success rate: 70%
Money-Saving Tips for U0967
  • 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 U0967 Diagnosis Process

Follow these systematic steps to accurately diagnose U0967. 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).

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: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to 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: Component testing - Use a multimeter or specific diagnostic tools to test suspected components (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components (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: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear 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: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (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: Communication Error Resolution in 2017 Chevrolet Silverado

Vehicle: 2017 Chevrolet Silverado 1500, 45,000 miles

Problem: Customer reported the check engine light was on and experienced rough shifting.

Diagnosis: Initial scan revealed code U0967. Visual inspection showed frayed wiring near the transmission control module.

Solution: Replaced damaged wiring and performed a software update on the ECU.

Cost: $450 (including parts and labor)

Result: Customer reported improved shifting performance and no recurrence of the check engine light.

Case Study 2: Defective Control Module in 2018 GMC Sierra

Vehicle: 2018 GMC Sierra 1500, 30,000 miles

Problem: Customer reported erratic transmission shifts and dashboard warning lights illuminated.

Diagnosis: OBD2 scan confirmed U0967. Further testing indicated the transmission control module was faulty.

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

Cost: $1,000 (including parts and labor)

Result: Post-repair, the vehicle's transmission shifted smoothly, and all warning lights were cleared.

Diagnose U0967

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: U0967
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes