Quick Answer
U0351 means: U0351 indicates a communication error between vehicle control modules.
Can I drive with U0351? It is advised to address this issue immediately to prevent further electrical problems.
Common Questions
What does U0351 mean and how does it affect my car?
The U0351 code signifies communication problems between your vehicle's control modules. This can affect various systems, leading to performance issues like erratic electronic features or warning lights. If left unresolved, it can lead to more significant issues, impacting safety and drivability.
What are the most common causes of U0351 and how much does it cost to fix?
Common causes include damaged wiring (60% likelihood), malfunctioning BCM, and electrical interference. Repair costs can range from $100 for simple wiring repairs to $600 for BCM replacement.
Can I drive my car with U0351 or should I stop immediately?
While you might still be able to drive your vehicle, it is essential to address the U0351 code immediately. Continuing to drive can lead to safety issues and further electrical damage.
How can I diagnose U0351 myself using GeekOBD APP?
Using the GeekOBD APP, you can perform an OBD2 scan to retrieve codes and freeze frame data. Look for any other related codes and assess the vehicle's behavior to help pinpoint the issue.
What vehicles are most commonly affected by U0351?
Vehicles like the 2015-2020 Ford F-150 and other models from manufacturers such as Chevy and Dodge have reported issues with U0351. Always check for recalls or technical service bulletins related to your specific vehicle.
How can I prevent U0351 from happening again?
Regular maintenance, including checking wiring and connectors, ensuring proper grounding, and keeping software updated, can help prevent the recurrence of U0351. Periodic diagnostic scans using tools like the GeekOBD APP can also be beneficial.
What is U0351?
The Diagnostic Trouble Code (DTC) U0351 indicates a communication issue between the vehicle's modules, specifically indicating that a module is unable to communicate properly with the body control module (BCM) or other control units. This code is commonly found in 2015-2020 Ford F-150 models, but it can also appear in a range of other vehicles across various manufacturers. When this code is triggered, it typically means that there is a fault in the wiring, connectors, or the module itself, leading to potential performance issues. Drivers may notice symptoms like warning lights on the dashboard, erratic behavior of electronic components (like power windows or lights), or even complete failure of certain systems. Ignoring this code can lead to further damage to the vehicle's electrical system, increased repair costs, and compromised safety features. It is critical to address U0351 promptly to ensure all vehicle systems function as intended and maintain the overall integrity of the vehicle's operations.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0351 is present:
- The check engine light stays on constantly, indicating a persistent issue within the vehicle's communication system.
- Drivers may notice that electronic features like power windows or door locks work intermittently, causing frustration and concern.
- Fuel economy may decrease by 5-10% due to inefficient engine performance related to communication failures.
- Dashboard warning lights for various systems may illuminate unexpectedly, indicating failure to communicate.
- There may be delayed response in the vehicle’s ignition or starting system, leading to potential no-start situations.
Possible Causes
Most common causes of U0351 (ordered by frequency):
- The most common cause of U0351 is damaged wiring or connectors, with a likelihood of around 60%. Corroded connectors or broken wires can interrupt signals between modules.
- A malfunctioning body control module (BCM) is another potential cause, where the BCM fails to process or relay information correctly between systems.
- Poor grounding or electrical interference can also lead to communication issues, where the vehicle's electrical system doesn't operate within normal parameters. Regular checks on grounding points can help prevent this.
- Less common but serious causes include software glitches in the vehicle's control modules that may require a software update or reprogramming.
- A rare cause could be a complete failure of a control module, which would require immediate replacement to restore communication.
U0351 Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repair or replacement of damaged wiring or connectors that may be causing communication issues.
- Total: $100 - $300
- Success rate: 85%
BCM Replacement
Replacement of the body control module if found defective after testing.
- Total: $300 - $600
- Success rate: 90%
Software Update
A software reprogramming or update of the vehicle's control modules to fix communication issues.
- Total: $100 - $200
- Success rate: 75%
Money-Saving Tips for U0351
- 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 U0351 Diagnosis Process
Follow these systematic steps to accurately diagnose U0351. 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 for proper voltage and ground (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components for proper voltage and ground (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes, ensuring all modules communicate (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes, ensuring all modules communicate (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any reoccurrence of the code (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any reoccurrence of the code (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: Repairing U0351 in a 2016 Ford F-150
Vehicle: 2016 Ford F-150, 60,000 miles
Problem: Customer reported multiple warning lights and intermittent electrical issues.
Diagnosis: Initial inspection revealed corroded connectors in the wiring harness leading to the BCM.
Solution: Replaced damaged wiring and connectors, followed by a software update to the BCM.
Cost: $350 (parts and labor included)
Result: All systems returned to normal operation with no further issues.
Case Study 2: Resolving U0351 in a 2018 Chevrolet Silverado
Vehicle: 2018 Chevrolet Silverado, 45,000 miles
Problem: Driver experienced malfunctioning dashboard lights and loss of electronic features.
Diagnosis: Diagnostic testing indicated a faulty BCM that failed to communicate with other modules.
Solution: Replaced the BCM and performed a system reset.
Cost: $500 (including parts and labor)
Result: Vehicle systems functioned correctly post-repair with all warning lights cleared.