Quick Answer
U0690 means: U0690 indicates a communication error between control modules in your vehicle.
Can I drive with U0690? Immediate attention is recommended to prevent further issues.
Common Questions
What does U0690 mean and how does it affect my car?
The U0690 code signifies a communication breakdown between control modules in your vehicle. This can impact essential functions like engine performance and electronic accessories, leading to erratic behavior and potential safety hazards.
What are the most common causes of U0690 and how much does it cost to fix?
Common causes include wiring issues (costing $150-$500), failed control modules (ranging from $300-$1200), and software glitches (around $100-$200). Each situation requires a different diagnostic approach to determine the exact issue.
Can I drive my car with U0690 or should I stop immediately?
While it's technically possible to drive with a U0690 code, it is advised against doing so. Continuing to drive could exacerbate the problem or lead to further damage to your vehicle's systems.
How can I diagnose U0690 myself using GeekOBD APP?
Using the GeekOBD APP, connect your OBD2 scanner to your vehicle's port and retrieve the trouble codes. Review the freeze frame data to understand when the code was triggered and check for any additional codes that may provide context.
What vehicles are most commonly affected by U0690?
The U0690 code is often seen in 2015-2018 models of Ford, Chrysler, and Dodge vehicles. Always check for any recalls or technical service bulletins related to your specific model.
How can I prevent U0690 from happening again?
Regular vehicle maintenance, including checking and cleaning electrical connections and ensuring wiring is intact, can help prevent U0690 from reoccurring. Also, keep your vehicle's software updated to mitigate potential bugs.
What is U0690?
The diagnostic trouble code (DTC) U0690 indicates a communication error between modules in your vehicle's network. This code suggests that one of the control modules—such as the body control module, engine control unit, or transmission control module—has lost communication with another module. This loss of communication can disrupt various functions, leading to issues like inconsistent vehicle performance, failure of certain electrical systems, or in some cases, the vehicle may not start at all. The U0690 code can manifest in various ways, including warning lights on the dashboard, erratic behavior of electronic components, and even reduced engine performance. If left unaddressed, it can lead to further complications, including potential damage to critical vehicle systems. Understanding the root cause of this communication error is essential for effective troubleshooting and repair. Most commonly, this code is associated with wiring issues, failed control modules, or poor connections that can develop over time due to wear and tear or environmental factors. Prompt diagnosis and repair are crucial to restore normal function and ensure safety on the road.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0690 is present:
- Check engine light stays on constantly, indicating a persistent issue that needs addressing.
- Dashboard warning lights illuminate irregularly, which may affect driving comfort and safety.
- Engine hesitates during acceleration, suggesting possible performance degradation due to communication issues.
- Reduced functionality of electronic accessories, such as power windows or door locks, that may stop responding properly.
- Inconsistent or poor fuel economy, with a noticeable drop of 10-15%, due to communication failures affecting engine performance.
Possible Causes
Most common causes of U0690 (ordered by frequency):
- Wiring issues (40% likelihood) - Damaged or corroded wiring connections can interrupt communication between modules.
- Failed control module (30% likelihood) - One of the involved control modules may be malfunctioning or have failed entirely.
- Poor connections (20% likelihood) - Loose or oxidized connectors can hinder communication between different vehicle systems.
- Software glitches (7% likelihood) - Bugs or outdated software in the vehicle's computer systems can lead to communication errors.
- Environmental factors (3% likelihood) - Exposure to moisture, dirt, or extreme temperatures can affect module performance.
U0690 Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repairing or replacing damaged wiring and connectors.
- Total: $150 - $500
- Success rate: 85%
Control Module Replacement
Replacing a faulty control module that is causing the communication error.
- Total: $300 - $1200
- Success rate: 90%
Software Update
Updating the vehicle's software to fix potential bugs affecting communication.
- Total: $100 - $200
- Success rate: 70%
Money-Saving Tips for U0690
- 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 U0690 Diagnosis Process
Follow these systematic steps to accurately diagnose U0690. 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).
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).
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).
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).
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).
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: Repair Case: 2017 Ford Fusion U0690 Code
Vehicle: 2017 Ford Fusion, 45,000 miles
Problem: Customer reported intermittent electrical issues and check engine light.
Diagnosis: Diagnostics revealed U0690 code along with poor connections in the body control module harness.
Solution: Repaired the wiring harness and ensured all connections were clean and tight.
Cost: $250 (including labor and parts)
Result: Vehicle functioned normally post-repair with no more warning lights.
Case Study 2: Repair Case: 2016 Chrysler 200 U0690 Code
Vehicle: 2016 Chrysler 200, 60,000 miles
Problem: Customer experienced issues with the engine not starting and dashboard lights malfunctioning.
Diagnosis: Found U0690 code due to a failed Engine Control Module (ECM).
Solution: Replaced the ECM with a new unit and performed necessary programming.
Cost: $950 (including parts and labor)
Result: After replacement, the vehicle started without issues and all systems operated correctly.