Quick Answer
U0667 means: U0667 indicates a communication error between vehicle modules.
Can I drive with U0667? Immediate attention is recommended to prevent further issues.
Common Questions
What does U0667 mean and how does it affect my car?
The U0667 code indicates a communication error between various electronic modules in your vehicle, which can lead to malfunctions in essential systems. If unresolved, it can compromise vehicle safety and performance over time.
What are the most common causes of U0667 and how much does it cost to fix?
Common causes include damaged wiring (40% likelihood), malfunctioning control modules, and poor connections. Repair costs typically range from $150 to $1,200 depending on the required repairs.
Can I drive my car with U0667 or should I stop immediately?
While you may still be able to drive your vehicle, it is advised to address the U0667 code promptly to avoid potential safety risks and further damage to vehicle systems.
How can I diagnose U0667 myself using GeekOBD APP?
To diagnose U0667, download the GeekOBD APP, connect it to your vehicle's OBD2 port, and retrieve diagnostic codes. Review freeze frame data to identify when the code occurred for focused troubleshooting.
What vehicles are most commonly affected by U0667?
The U0667 code is frequently reported in Ford and GM vehicles manufactured between 2005 and 2022, including models like the Ford F-150 and Chevrolet Silverado.
How can I prevent U0667 from happening again?
Regular maintenance, including electrical system checks and cleaning of connections, can help prevent U0667. Additionally, addressing any signs of wiring damage immediately can mitigate risks.
What is U0667?
DTC U0667 is a diagnostic trouble code indicating a communication error within the vehicle's network. Specifically, it refers to a failure in the communication between modules, typically within Ford and General Motors (GM) vehicles ranging from 2005 to 2022. This code often arises when one control module cannot properly communicate with another, which can lead to various operational issues. Car owners may notice that certain features, such as power windows, audio systems, and even safety features, may not function correctly. The root cause could be anything from a defective wiring harness or corroded connectors to software malfunctions in the vehicle's control systems. If left unaddressed, a U0667 code can lead to further complications, including complete system failures or even compromised safety features. It’s crucial for vehicle owners to understand that while the vehicle may still drive, the underlying issues need prompt attention to prevent more serious problems down the line.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0667 is present:
- The check engine light is illuminated, often staying lit continuously, indicating a system malfunction.
- Power features like windows or locks may fail to operate correctly, leading to frustrating user experiences.
- The vehicle might exhibit erratic behavior, such as stalling or hesitation during acceleration, which can be alarming for drivers.
- Audio systems may malfunction, with sound output cutting in and out or failing entirely.
- Dashboard warning lights may illuminate unexpectedly, indicating other potential problems.
Possible Causes
Most common causes of U0667 (ordered by frequency):
- The most common cause of the U0667 code is a faulty wiring harness, accounting for about 40% of cases, where damaged or corroded wires interfere with module communication.
- A second frequent cause is malfunctioning control modules, which can happen due to software bugs or age-related degradation.
- Thirdly, poor connections at module terminals can lead to intermittent communication failures, making it essential to regularly inspect and clean these connections to prevent issues.
- While less common, serious issues like short circuits in the electrical system can occur, potentially leading to complete module failure.
- A rare but possible cause includes factory-installed defects in specific vehicle models, often addressed through recall campaigns.
U0667 Repair Costs
Cost Breakdown by Repair Type
Wiring Harness Repair
Repairing or replacing damaged segments of the wiring harness to restore communication.
- Total: $150 - $500
- Success rate: 90%
Control Module Replacement
Replacing a defective control module that is unable to communicate properly.
- Total: $400 - $1,200
- Success rate: 85%
Software Update
Performing a software update to rectify bugs causing communication errors.
- Total: $100 - $200
- Success rate: 75%
Money-Saving Tips for U0667
- 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 U0667 Diagnosis Process
Follow these systematic steps to accurately diagnose U0667. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Begin with an initial visual inspection to look for damaged wiring, loose connections, or signs of corrosion around the control modules (5-10 minutes)
Step 1: Begin with an initial visual inspection to look for damaged wiring, loose connections, or signs of corrosion around the control modules (5-10 minutes).
Step 2: Step 2: Use an OBD2 scanner, like the GeekOBD APP, to retrieve all codes and freeze frame data, providing context for the U0667 code (10-15 minutes)
Step 2: Use an OBD2 scanner, like the GeekOBD APP, to retrieve all codes and freeze frame data, providing context for the U0667 code (10-15 minutes).
Step 3: Step 3: Perform component testing with a multimeter to check the voltage and resistance of suspected faulty components (20-30 minutes)
Step 3: Perform component testing with a multimeter to check the voltage and resistance of suspected faulty components (20-30 minutes).
Step 4: Step 4: Conduct a functional test of the systems affected by the code to ensure proper operation after repairs and clear the faults (10-15 minutes)
Step 4: Conduct a functional test of the systems affected by the code to ensure proper operation after repairs and clear the faults (10-15 minutes).
Step 5: Step 5: Finally, perform a road test under various conditions to confirm the success of the repair and that no additional codes appear (15-20 minutes)
Step 5: Finally, perform a road test under various conditions to confirm the success of the repair and that no additional codes appear (15-20 minutes).
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: Ford F-150 2017 Communication Issue
Vehicle: 2017 Ford F-150, 75,000 miles
Problem: Customer reported intermittent power loss to windows and dashboard lights.
Diagnosis: Visual inspection revealed corroded connectors near the driver’s side door module.
Solution: Replaced corroded connectors and cleaned wiring harness.
Cost: $250 (parts and labor)
Result: Issue resolved with all systems functioning properly after repair.
Case Study 2: Chevrolet Silverado 2019 Module Malfunction
Vehicle: 2019 Chevrolet Silverado, 50,000 miles
Problem: Customer experienced a check engine light with U0667 code present.
Diagnosis: Diagnostic scan showed multiple communication errors across modules.
Solution: Updated software for the main control module and replaced a faulty wiring harness.
Cost: $500 (parts and labor)
Result: All systems restored to normal operation post-repair.