Quick Answer
U027F means: U027F indicates a communication failure between the EPS control module and the vehicle's CAN.
Can I drive with U027F? Immediate diagnosis recommended to avoid steering issues.
Common Questions
What does U027F mean and how does it affect my car?
The U027F code signifies a communication problem with your Electric Power Steering system. This can lead to a loss of steering assistance, making your vehicle harder to control. It’s crucial to address this issue promptly to ensure your safety on the road.
What are the most common causes of U027F and how much does it cost to fix?
Common causes include a faulty EPS control module, wiring issues, or software glitches. Repair costs can range from $150 for wiring repairs to $1,200 for module replacement. It's best to consult a professional for an accurate diagnosis.
Can I drive my car with U027F or should I stop immediately?
Driving with U027F can be dangerous due to potential steering loss. It is recommended to have the issue diagnosed and repaired as soon as possible to avoid accidents.
How can I diagnose U027F myself using GeekOBD APP?
You can use the GeekOBD APP to scan for codes and check the freeze frame data, which helps identify the context of the error. Follow the diagnostic steps to test the EPS system components.
What vehicles are most commonly affected by U027F?
The U027F code is frequently seen in 2013-2018 Ford Fusion and 2014-2017 Chrysler 200 models. Always check for any recalls or Technical Service Bulletins related to the EPS system.
How can I prevent U027F from happening again?
Regular maintenance, including electrical inspections and software updates, can help prevent U027F. Keeping an eye on steering performance and addressing any warning lights promptly is also crucial.
What is U027F?
The diagnostic trouble code (DTC) U027F indicates a communication issue between the vehicle's Control Area Network (CAN) and the Electric Power Steering (EPS) control module. This DTC often surfaces in vehicles like the 2013-2018 Ford Fusion and 2014-2017 Chrysler 200, where the EPS system is crucial for providing steering assistance. When U027F is triggered, it typically means that the EPS module is unable to communicate properly with other modules in the vehicle's network. This can lead to various issues, including loss of power steering assistance, which can make steering heavy and difficult. Drivers may also notice warning lights on the dashboard, including the check engine light or a dedicated EPS warning light. In some cases, the vehicle might enter a failsafe mode, where steering assistance is temporarily disabled to ensure driver safety. Ignoring this code can lead to more severe problems and potential safety risks, so addressing it promptly is critical for maintaining vehicle performance and safety.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U027F is present:
- Check engine light stays on constantly, indicating an underlying issue that needs attention.
- Steering feels heavier than usual, making maneuvering the vehicle challenging, especially at low speeds.
- Driver may experience inconsistent steering response, leading to difficulty in maintaining a straight path.
- Dashboard displays EPS warning light, alerting the driver to potential power steering failure.
- Unusual noises from the steering column, which might indicate internal component issues.
Possible Causes
Most common causes of U027F (ordered by frequency):
- Faulty EPS control module - Most common cause (about 50% likelihood). This module can fail due to electrical issues or wear over time.
- Wiring issues or damaged connectors - Second most common cause (30%). Loose or corroded connections can disrupt communication between modules.
- Software glitches - Third cause (15%). Occasionally, the vehicle's software may need an update to resolve communication errors.
- Faulty steering column position sensor - Less common but serious cause (4%). This sensor can affect the steering response if malfunctioning.
- Rare powertrain control module failure - Rare cause (1%). A failing PCM can disrupt communication across multiple systems.
U027F Repair Costs
Cost Breakdown by Repair Type
EPS Control Module Replacement
Replacing the faulty EPS control module to restore proper communication.
- Total: $600 - $1,200
- Success rate: 90%
Wiring Repair
Repairing or replacing damaged wiring and connectors for better communication.
- Total: $150 - $300
- Success rate: 80%
Money-Saving Tips for U027F
- 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 U027F Diagnosis Process
Follow these systematic steps to accurately diagnose U027F. 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 the EPS control module and wiring (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the EPS control module and wiring (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (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: 2015 Ford Fusion EPS Issue
Vehicle: 2015 Ford Fusion, 75,000 miles
Problem: Customer reported heavy steering and EPS warning light illuminated.
Diagnosis: After running diagnostics with GeekOBD APP, U027F was detected. A visual inspection revealed damaged wiring.
Solution: Repaired wiring and replaced the EPS control module.
Cost: $850 (including parts and labor)
Result: Steering performance restored, and no further issues were reported.
Case Study 2: 2016 Chrysler 200 Steering Failure
Vehicle: 2016 Chrysler 200, 60,000 miles
Problem: Customer experienced intermittent steering loss and EPS warning light.
Diagnosis: Diagnostics pointed to U027F. The EPS control module was tested and showed failure.
Solution: Replaced the EPS control module and updated the vehicle’s software.
Cost: $1,000 (including parts and labor)
Result: Vehicle steering was fully restored with no further complaints.