Quick Answer
U0473 means: U0473 indicates a communication failure between the ECM and the fuel pump control module.
Can I drive with U0473? Immediate attention is required to prevent stalling or starting issues.
Common Questions
What does U0473 mean and how does it affect my car?
The U0473 code means there's a communication error between your car's engine control module and the fuel pump control module. This can lead to stalling, starting difficulties, or reduced engine performance, affecting your vehicle's reliability.
What are the most common causes of U0473 and how much does it cost to fix?
Common causes include a faulty fuel pump control module, damaged wiring, or software issues. Repair costs can range from $75 for wiring repairs to $400 for module replacement, depending on the specific issue.
Can I drive my car with U0473 or should I stop immediately?
Driving with a U0473 code is risky, as it can lead to engine stalling or starting issues. It's best to address the problem promptly to ensure safety and avoid more extensive repairs.
How can I diagnose U0473 myself using GeekOBD APP?
Using the GeekOBD APP, you can scan your vehicle for error codes, check freeze frame data, and monitor real-time parameters. This can help identify if the communication issue is intermittent or persistent.
What vehicles are most commonly affected by U0473?
The U0473 code is commonly found in various Ford models, particularly the 2015-2018 F-150, as well as certain Chevrolet vehicles. Always check for any manufacturer recalls related to fuel system issues.
How can I prevent U0473 from happening again?
Regular maintenance, including checking wiring and connectors for wear, can help prevent U0473. Additionally, keeping your fuel system clean and ensuring software updates for your ECM can mitigate risks.
What is U0473?
The U0473 diagnostic trouble code (DTC) indicates a communication issue between the engine control module (ECM) and the fuel pump control module (FPCM). This code is typically triggered when the ECM cannot establish or maintain communication with the FPCM, which is essential for regulating the fuel pump's operation. In vehicles with modern fuel injection systems, the fuel pump control module plays a critical role in ensuring optimal fuel delivery based on engine demands. Commonly seen in vehicles like the 2015-2018 Ford F-150 and certain Chevrolet models, the U0473 code can lead to significant performance issues. When this code is present, drivers may experience symptoms such as engine stalling, difficulty starting the vehicle, or poor fuel efficiency. Ignoring this code can lead to more severe problems, including engine misfires or damage to the fuel delivery system. It's crucial to address U0473 promptly to ensure reliable vehicle performance and maintain safety on the road.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U0473 is present:
- Check engine light illuminated consistently, indicating a malfunction.
- Engine may stall unexpectedly, especially during acceleration or deceleration.
- Difficulty starting the vehicle, leading to multiple attempts before the engine turns over.
- Engine performance issues such as reduced power and poor throttle response.
- Fuel economy may decrease noticeably, with reports of a 15-20% drop in efficiency.
Possible Causes
Most common causes of U0473 (ordered by frequency):
- 1. Faulty fuel pump control module - approximately 50% likelihood; this module can fail due to heat, moisture, or electrical issues.
- 2. Damaged wiring or connectors between the ECM and FPCM - common due to wear and tear and can cause intermittent communication issues.
- 3. Software glitches in the ECM - these can often be resolved with a software update or reprogramming.
- 4. Corrosion at connection points - this can lead to poor electrical contact, affecting communication.
- 5. Faulty ECM - while less common, a malfunctioning ECM can also result in communication failures.
U0473 Repair Costs
Cost Breakdown by Repair Type
Replace Fuel Pump Control Module
Replacing the faulty FPCM with a new or refurbished unit.
- Total: $150 - $400
- Success rate: 85%
Repair Wiring Harness
Repairing damaged wires or connections between the ECM and FPCM.
- Total: $75 - $200
- Success rate: 70%
ECM Reprogramming
Updating or reprogramming the ECM software to resolve communication issues.
- Total: $100 - $250
- Success rate: 60%
Money-Saving Tips for U0473
- 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 U0473 Diagnosis Process
Follow these systematic steps to accurately diagnose U0473. 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 to test the voltage at the FPCM and check for continuity in the wiring (20-30 minutes)
Step 3: Component testing - Use a multimeter to test the voltage at the FPCM and check for continuity in the wiring (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes using GeekOBD APP (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes using 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: 2017 Ford F-150 Fuel Pump Control Module Replacement
Vehicle: 2017 Ford F-150, 60,000 miles
Problem: Customer reported intermittent engine stalling and difficulty starting.
Diagnosis: Initial scan revealed U0473 code. Visual inspection showed corroded connectors.
Solution: Replaced the fuel pump control module and cleaned connectors.
Cost: $350 (parts: $300, labor: $50)
Result: Customer reported improved engine performance and no further issues.
Case Study 2: 2016 Chevrolet Silverado Wiring Repair
Vehicle: 2016 Chevrolet Silverado, 75,000 miles
Problem: Engine stalling and check engine light on.
Diagnosis: Found U0473 code. Wires between ECM and FPCM were frayed.
Solution: Repaired wiring harness and secured connections.
Cost: $120 (parts: $20, labor: $100)
Result: Stalling issues resolved, and vehicle performance improved.