Quick Answer
U0571 means: U0571 indicates a communication error between control modules in your vehicle.
Can I drive with U0571? Immediate attention is recommended to prevent further complications.
Common Questions
What does U0571 mean and how does it affect my car?
DTC U0571 indicates a communication error between the vehicle's control modules. This can lead to performance issues, including erratic shifting and decreased fuel efficiency. If left unresolved, it can cause further complications, making it essential to diagnose and repair.
What are the most common causes of U0571 and how much does it cost to fix?
Common causes include faulty wiring (60% likelihood), malfunctioning control modules, and software issues. Repair costs can range from $150 for wiring repairs to $1200 for module replacements, depending on the specific issue and vehicle model.
Can I drive my car with U0571 or should I stop immediately?
It’s advisable to stop driving if you see the U0571 code, as the communication failure can lead to serious performance issues. Ignoring it could escalate repairs and compromise safety.
How can I diagnose U0571 myself using GeekOBD APP?
To diagnose U0571 using the GeekOBD APP, connect the app to your vehicle’s OBD2 port, scan for codes, and review freeze-frame data. Look for patterns or additional codes that may indicate specific modules at fault.
What vehicles are most commonly affected by U0571?
DTC U0571 is frequently reported in 2015-2018 Ford F-150 models, but can also appear in other Ford vehicles with similar electronic systems. Always check for specific recalls or technical service bulletins related to your vehicle.
How can I prevent U0571 from happening again?
Regular vehicle maintenance, such as checking and cleaning connections, ensuring software updates are performed, and addressing electrical issues promptly, can help prevent U0571 from occurring again.
What is U0571?
DTC U0571 refers to a fault in the communication between the vehicle's control modules, specifically indicating that a message was received that is not valid or does not conform to the expected format. This issue often arises in vehicles equipped with advanced electronic systems, such as the 2015-2018 Ford F-150, which rely on multiple modules to communicate effectively. When this code is triggered, it usually indicates that there is a problem with the data being exchanged between modules, which can lead to a range of performance issues. For example, if the engine control module (ECM) and transmission control module (TCM) cannot communicate properly, it could result in erratic shifting, decreased fuel efficiency, or even stalling. Ignoring this code could lead to more significant issues down the line, as proper communication between modules is crucial for the overall performance and safety of the vehicle. It’s essential to address this fault promptly to ensure your Ford F-150 operates smoothly and reliably.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0571 is present:
- The check engine light remains illuminated, indicating a need for diagnostics.
- You may experience erratic shifting or delayed acceleration, especially in automatic transmission vehicles.
- Fuel economy may decrease by 10-15%, as the engine struggles to operate efficiently due to communication issues.
- Electrical systems, such as power windows or radio, may exhibit intermittent failures.
- In some cases, the vehicle may fail to start or exhibit hesitation during ignition.
Possible Causes
Most common causes of U0571 (ordered by frequency):
- The most common cause of U0571 is faulty wiring or poor connections between the control modules, with about 60% likelihood. Corrosion or loose connectors can disrupt communication.
- Another potential cause is a malfunctioning control module itself, such as a failing ECM or TCM, which might not interpret or send messages correctly.
- Software issues can also trigger U0571; ensuring your vehicle’s software is up-to-date can prevent this problem. Regular updates from the dealership are recommended.
- Less common but serious causes include physical damage to the wiring harness from wear and tear or an accident, leading to significant repair costs.
- A rare cause could be a factory recall on the vehicle’s communication systems; checking for any active recalls is advisable.
U0571 Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repair or replace damaged wiring and connectors to restore communication.
- Total: $150 - $400
- Success rate: 85%
Control Module Replacement
Replace malfunctioning control modules if they are diagnosed as faulty.
- Total: $500 - $1200
- Success rate: 90%
Software Update
Perform a software update for the vehicle’s control systems.
- Total: $50 - $150
- Success rate: 70%
Money-Saving Tips for U0571
- 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 U0571 Diagnosis Process
Follow these systematic steps to accurately diagnose U0571. 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 related to communication (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components related to communication (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes to ensure the issue has been resolved (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes to ensure the issue has been resolved (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 fault (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 fault (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: U0571 Repair Case: 2016 Ford F-150
Vehicle: 2016 Ford F-150, 65,000 miles
Problem: Customer reported check engine light and erratic shifting.
Diagnosis: Initial scans revealed U0571. Visual inspection showed corrosion on connectors.
Solution: Cleaned connectors and repaired wiring harness. Updated software.
Cost: $300 (including parts and labor)
Result: Customer reported improved shifting and no reoccurrence of the code.
Case Study 2: U0571 Issue Resolved: 2017 Ford Explorer
Vehicle: 2017 Ford Explorer, 40,000 miles
Problem: Customer experienced starting issues and check engine light.
Diagnosis: Found U0571 during diagnostics; traced to faulty ECM.
Solution: Replaced ECM and performed system tests.
Cost: $900 (including parts and labor)
Result: Vehicle started normally and no further issues reported.