Quick Answer
U0116 means: U0116 means lost communication with the fuel pump control module.
Can I drive with U0116? Immediate attention is recommended to prevent engine performance issues.
Common Questions
What does U0116 mean and how does it affect my car?
The U0116 code indicates a communication failure between the Engine Control Module and the Fuel Pump Control Module. This can lead to stalling, starting issues, and poor fuel efficiency, impacting your vehicle's overall performance.
What are the most common causes of U0116 and how much does it cost to fix?
Typical causes include damaged wiring (60% chance), faulty FPCM, and loose connections. Repair costs range from $100 to $600, depending on the issue.
Can I drive my car with U0116 or should I stop immediately?
While you may be able to drive short distances, it's advisable to address the U0116 code immediately to prevent potential stalling or safety hazards on the road.
How can I diagnose U0116 myself using GeekOBD APP?
Connect your GeekOBD APP to the vehicle's OBD2 port. Run a full scan to retrieve the U0116 code, then check freeze frame data to understand when the problem occurs.
What vehicles are most commonly affected by U0116?
This code is commonly reported in 2015-2018 Ford F-150 models, but can also appear in other vehicles equipped with electronic fuel pump systems.
How can I prevent U0116 from happening again?
Regularly inspect wiring for wear and corrosion, ensure clean and secure connections, and consider periodic software updates for your vehicle's ECM.
What is U0116?
The Diagnostic Trouble Code (DTC) U0116 indicates that your vehicle’s Engine Control Module (ECM) has lost communication with the Fuel Pump Control Module (FPCM). This code can surface in various makes and models, but it is particularly common in vehicles like the 2015-2018 Ford F-150. The FPCM is responsible for regulating the fuel pump's operation, ensuring that the engine receives the appropriate amount of fuel. When the ECM cannot communicate with this module, it can lead to significant issues such as engine stalling or failure to start. Drivers may experience symptoms like a sudden loss of power while driving or difficulty starting the vehicle altogether. This code usually signals a problem with wiring or connectors, a faulty FPCM, or issues with the ECM itself. Ignoring this code can lead to decreased fuel efficiency and potential damage to the engine over time, making it crucial to address it promptly. If you find this code present in your vehicle’s OBD2 system, it is essential to have it diagnosed and repaired as soon as possible to ensure optimal performance and avoid more costly repairs down the line.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0116 is present:
- Check engine light illuminates and stays on, indicating a fault in the fuel system.
- Engine hesitates or stalls during acceleration, leading to a loss of power and potential safety hazards.
- Difficulty starting the vehicle, which may require multiple attempts before the engine turns over.
- Fuel economy may decrease significantly, often by 10-20%, due to improper fuel delivery.
- Unusual noises from the fuel pump area or the fuel system, indicating that the pump may be malfunctioning.
Possible Causes
Most common causes of U0116 (ordered by frequency):
- The most common cause of U0116 is a wiring issue, such as damaged or corroded wires leading to the FPCM, with a likelihood of 60%.
- A faulty Fuel Pump Control Module itself can cause this error, often due to internal electronic failures or water intrusion.
- Loose or poor electrical connections at the FPCM or the ECM can lead to intermittent communication failure; ensuring proper connections can prevent this.
- Less common but serious causes can include a failing ECM, which could lead to a total loss of vehicle control.
- Rarely, software glitches in the vehicle's computer system may trigger a U0116 code, requiring a software update or reprogramming.
U0116 Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repairing damaged or corroded wiring to restore communication with the FPCM.
- Total: $100 - $300
- Success rate: 85%
Fuel Pump Control Module Replacement
Replacing a faulty FPCM with a new unit to resolve communication issues.
- Total: $200 - $600
- Success rate: 90%
ECM Reprogramming
Updating or reprogramming the ECM to fix any software-related issues.
- Total: $150 - $400
- Success rate: 70%
Money-Saving Tips for U0116
- 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 U0116 Diagnosis Process
Follow these systematic steps to accurately diagnose U0116. 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, which should take about 5-10 minutes
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion, which should take about 5-10 minutes.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, taking approximately 10-15 minutes
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, taking approximately 10-15 minutes.
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the fuel pump control module and associated wiring, which may take 20-30 minutes
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the fuel pump control module and associated wiring, which may take 20-30 minutes.
Step 4: Step 4: System function test - Verify the proper operation of the fuel pump after repairs and clear codes, requiring about 10-15 minutes
Step 4: System function test - Verify the proper operation of the fuel pump after repairs and clear codes, requiring about 10-15 minutes.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success, estimated at 15-20 minutes
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success, estimated at 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 F-150 Stalling Issue
Vehicle: 2017 Ford F-150, 45,000 miles
Problem: Customer reported intermittent stalling and check engine light illumination.
Diagnosis: Diagnostic scan revealed U0116 code. Visual inspection found corroded wiring harness.
Solution: Repaired and replaced damaged wiring. Cleared codes and confirmed proper fuel system function.
Cost: $250 (includes labor and parts)
Result: Customer reported no further issues and improved engine performance.
Case Study 2: Repair Case: 2016 Chevrolet Silverado Starting Problems
Vehicle: 2016 Chevrolet Silverado, 60,000 miles
Problem: Customer experienced difficulty starting and occasional engine sputtering.
Diagnosis: U0116 code identified. Further testing showed a faulty fuel pump control module.
Solution: Replaced the FPCM and verified proper operation. Conducted road tests.
Cost: $550 (parts and labor included)
Result: Vehicle started reliably, and customer satisfied with repair.