Quick Answer
U0117 means: U0117 signifies lost communication with the fuel pump control module, causing potential engine issues.
Can I drive with U0117? Immediate attention recommended to avoid further engine complications.
Common Questions
What does U0117 mean and how does it affect my car?
U0117 indicates a communication issue between your car's engine control module and the fuel pump control module. This can lead to starting problems, engine stalling, and reduced fuel efficiency.
What are the most common causes of U0117 and how much does it cost to fix?
Common causes include a faulty fuel pump control module, damaged wiring, or blown fuses. Repair costs typically range from $100 to $500 depending on the issue.
Can I drive my car with U0117 or should I stop immediately?
It's advisable to stop driving your vehicle if you see the U0117 code, as it can lead to further engine problems or failure to start.
How can I diagnose U0117 myself using GeekOBD APP?
You can use the GeekOBD APP to scan for DTC codes, view live data from the fuel pump control module, and check for any freeze frame data that indicates when the issue occurred.
What vehicles are most commonly affected by U0117?
This code is frequently seen in 2010-2015 Ford F-150 and 2008-2016 Chevrolet Silverado models, among others.
How can I prevent U0117 from happening again?
Regular vehicle maintenance, including electrical system checks and avoiding water exposure in engine compartments, can help prevent recurrence of U0117.
What is U0117?
The diagnostic trouble code (DTC) U0117 indicates a communication issue between the Engine Control Module (ECM) and the Fuel Pump Control Module (FPCM). This code typically arises when the ECM fails to receive a response from the FPCM, which is responsible for regulating the fuel pump's operation. In simpler terms, your vehicle is having trouble talking to the part that controls the fuel supply, which can lead to poor engine performance or even a no-start condition. When this code appears, you may notice that your engine may hesitate, stall, or struggle to start, particularly when the fuel levels are low. It's crucial to address this issue promptly, as neglecting it can lead to more severe problems, including engine misfires or damage. The FPCM might not only be malfunctioning but could also have issues with its wiring or connections. In some cases, there may be a software issue requiring a simple update. Understanding U0117 is essential for car owners, especially those with vehicles like the Ford F-150 or Chevrolet Silverado, as timely repairs can prevent costly damages down the line.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0117 is present:
- Check engine light stays illuminated, indicating a problem with the fuel system.
- Engine may hesitate or stall unexpectedly, especially during acceleration or when starting.
- Fuel economy may drop significantly, with reports of a 10-15% reduction in efficiency.
- Difficulty starting the vehicle, particularly after refueling or in cold weather conditions.
- Unusual noises from the fuel pump or fuel system, indicating operational inconsistencies.
Possible Causes
Most common causes of U0117 (ordered by frequency):
- The most common cause of U0117 is a faulty fuel pump control module, with a likelihood of about 60%. This module can fail due to exposure to moisture or electrical issues.
- A second common cause is damaged or corroded wiring in the communication circuit between the ECM and FPCM, which can account for around 25% of cases.
- The third cause could be a blown fuse related to the fuel pump system, often overlooked during inspections. Regular checks of electrical components can help prevent this.
- Less commonly, software glitches in the ECM or FPCM may be responsible, requiring a software update from the dealership.
- A rare but serious cause might be a malfunctioning ECM itself, which should be diagnosed through professional testing.
U0117 Repair Costs
Cost Breakdown by Repair Type
Fuel Pump Control Module Replacement
Replacing the faulty fuel pump control module with a new OEM part.
- Total: $200 - $500
- Success rate: 85%
Wiring Repair or Replacement
Repairing or replacing damaged wiring in the communication circuit.
- Total: $100 - $300
- Success rate: 90%
ECM Software Update
Updating the software in the engine control module to fix communication issues.
- Total: $50 - $150
- Success rate: 75%
Money-Saving Tips for U0117
- 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 U0117 Diagnosis Process
Follow these systematic steps to accurately diagnose U0117. 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 FPCM and associated wiring (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the FPCM and associated 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 and monitor for returning codes (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for returning codes (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: Fuel Pump Control Module Replacement in 2013 Ford F-150
Vehicle: 2013 Ford F-150, 75,000 miles
Problem: Customer reported intermittent stalling and poor acceleration.
Diagnosis: After retrieving the U0117 code using the GeekOBD APP, a visual inspection revealed damaged wiring to the fuel pump control module.
Solution: Replaced the fuel pump control module and repaired the wiring. Updated ECM software as a precaution.
Cost: $450 (parts: $300, labor: $150)
Result: Vehicle performance returned to normal with no further issues reported.
Case Study 2: Wiring Repair for 2015 Chevrolet Silverado
Vehicle: 2015 Chevrolet Silverado, 60,000 miles
Problem: Check engine light was on with symptoms of hard starting.
Diagnosis: DTC U0117 was present. Inspected wiring and found corrosion at the connector.
Solution: Repaired the damaged wiring and cleaned the connectors.
Cost: $150 (parts: $20, labor: $130)
Result: Customer reported improved starting and no further codes after repair.