Quick Answer
U0907 means: U0907 indicates a communication failure on the CAN bus in your vehicle.
Can I drive with U0907? Immediate attention recommended to prevent further issues.
Common Questions
What does U0907 mean and how does it affect my car?
U0907 indicates that there's a communication failure within your vehicle's control systems. This can affect various functionalities, leading to poor performance and potentially preventing your vehicle from starting. It's crucial to address this issue as it can lead to more significant problems over time.
What are the most common causes of U0907 and how much does it cost to fix?
Common causes include faulty wiring (40% likelihood), malfunctioning modules (30%), and software glitches. Repair costs can range from $150 for wiring repairs to over $1,000 for module replacements.
Can I drive my car with U0907 or should I stop immediately?
While you may be able to drive your vehicle short distances, it's not advisable to ignore the U0907 code. Driving with this code can lead to more severe issues, compromising vehicle safety and performance.
How can I diagnose U0907 myself using GeekOBD APP?
Using the GeekOBD APP, you can connect to your vehicle's OBD2 port to retrieve diagnostic trouble codes, including U0907. The app allows you to view freeze frame data and perform system tests to help identify the source of the communication issue.
What vehicles are most commonly affected by U0907?
Commonly affected vehicles include the 2016-2018 Ford F-150, 2018 Chevrolet Silverado, and 2017 Honda Accord. If your vehicle is among these models, it's important to stay vigilant for symptoms of U0907.
How can I prevent U0907 from happening again?
To prevent U0907, regularly inspect your vehicle's wiring for damage, ensure all connectors are secure, and keep your vehicle's software updated. Avoid installing aftermarket accessories that may interfere with the CAN bus.
What is U0907?
The diagnostic trouble code (DTC) U0907 indicates a communication issue within the vehicle's control systems, specifically relating to the CAN (Controller Area Network) bus. This code is triggered when the Engine Control Module (ECM) or Transmission Control Module (TCM) detects that a module on the CAN bus has stopped communicating or is unresponsive. In simpler terms, it's like a broken conversation between the different parts of your vehicle. This can lead to various issues, including poor vehicle performance, malfunctioning accessories, and may even prevent the engine from starting. Commonly seen in vehicles like the 2016 Ford F-150 and 2018 Chevrolet Silverado, the effects of U0907 can range from minor inconveniences, such as warning lights on the dashboard, to more severe problems affecting drivability. Ignoring this code can lead to further complications, as other systems may start to malfunction due to a lack of communication. If your dashboard lights up with the U0907 code, it's essential to address it promptly to avoid more extensive repairs down the line.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0907 is present:
- The check engine light illuminates or flashes continuously, indicating a serious issue that needs attention.
- You may experience erratic behavior in various systems, such as the radio or climate control, which may intermittently fail to respond.
- In some cases, the engine may hesitate during acceleration, resulting in a loss of power and an overall sluggish performance.
- Increased fuel consumption may be observed, leading to a noticeable decrease in fuel economy, sometimes up to 15%.
- Other warning lights may illuminate on the dashboard, such as ABS or traction control warnings, indicating additional system failures.
Possible Causes
Most common causes of U0907 (ordered by frequency):
- The most common cause of U0907 is a faulty or damaged wiring harness, which accounts for about 40% of cases. This can include frayed wires or poor connections that disrupt communication.
- Another frequent culprit is a malfunctioning module on the CAN bus, such as the ABS module or TCM, which can cause about 30% of U0907 occurrences. These modules can fail due to age or internal faults.
- In some cases, software issues or glitches within the vehicle's ECU can trigger this code, especially in newer vehicles. Keeping your vehicle's software updated can help prevent this.
- Less common but serious causes include a complete failure of the CAN bus itself, which can lead to widespread system failures if not addressed.
- A rare cause could be interference from aftermarket accessories, like poorly installed audio systems, which can disrupt the CAN bus communication.
U0907 Repair Costs
Cost Breakdown by Repair Type
Wiring Harness Repair
Repairing or replacing damaged wiring that is affecting communication on the CAN bus.
- Total: $150 - $500
- Success rate: 85%
Module Replacement
Replacing a faulty module (e.g., TCM or ABS module) that is causing communication issues.
- Total: $300 - $1,000
- Success rate: 90%
Software Update
Updating the ECU software to resolve communication issues caused by glitches.
- Total: $50 - $150
- Success rate: 75%
Money-Saving Tips for U0907
- 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 U0907 Diagnosis Process
Follow these systematic steps to accurately diagnose U0907. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Conduct an initial visual inspection of the wiring and connections related to the CAN bus system to identify any obvious damage or corrosion (5-10 minutes)
Step 1: Conduct an initial visual inspection of the wiring and connections related to the CAN bus system to identify any obvious damage or corrosion (5-10 minutes).
Step 2: Step 2: Use an OBD2 scanner, such as the GeekOBD APP, to retrieve all existing codes and any freeze frame data to gain context about the fault (10-15 minutes)
Step 2: Use an OBD2 scanner, such as the GeekOBD APP, to retrieve all existing codes and any freeze frame data to gain context about the fault (10-15 minutes).
Step 3: Step 3: Perform component testing on the suspected modules using a multimeter or specific diagnostic tools to verify their functionality (20-30 minutes)
Step 3: Perform component testing on the suspected modules using a multimeter or specific diagnostic tools to verify their functionality (20-30 minutes).
Step 4: Step 4: Conduct a system function test to ensure all components are operating correctly after repairs and clear any stored codes (10-15 minutes)
Step 4: Conduct a system function test to ensure all components are operating correctly after repairs and clear any stored codes (10-15 minutes).
Step 5: Step 5: Perform a road test to evaluate the vehicle under various driving conditions to confirm the success of the repairs (15-20 minutes)
Step 5: Perform a road test to evaluate the vehicle under various driving conditions to confirm the success of the repairs (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: 2016 Ford F-150 U0907 Repair
Vehicle: 2016 Ford F-150, 45,000 miles
Problem: Customer reported intermittent check engine light and poor acceleration.
Diagnosis: Initial scans revealed U0907 along with several other codes. Visual inspection showed frayed wiring near the TCM.
Solution: Repaired the damaged wiring and cleared the codes. Conducted a road test to confirm the fix.
Cost: $250 (including labor and parts)
Result: Customer reported normal performance and no further issues.
Case Study 2: 2018 Chevrolet Silverado U0907 Case Study
Vehicle: 2018 Chevrolet Silverado, 30,000 miles
Problem: Customer experienced erratic behavior with the radio and dashboard lights.
Diagnosis: Diagnosed U0907; found a faulty ABS module affecting communication.
Solution: Replaced the ABS module and updated the vehicle's software.
Cost: $800 (parts and labor included)
Result: Post-repair verification showed all systems functioning correctly.