Quick Answer
P0627 means: P0627 indicates a malfunction in the fuel pump control module circuit.
Can I drive with P0627? Immediate attention is recommended to avoid engine performance issues.
Common Questions
What does P0627 mean and how does it affect my car?
P0627 means there’s an issue with your fuel pump control module. This can lead to poor engine performance, difficulty starting, and reduced fuel efficiency. Over time, if not addressed, it can lead to more serious engine problems.
What are the most common causes of P0627 and how much does it cost to fix?
Common causes include a faulty fuel pump control module and damaged wiring. Repair costs can range from $100 for wiring repairs to $600 for module replacement, depending on the extent of the issue.
Can I drive my car with P0627 or should I stop immediately?
It’s best to avoid driving if your vehicle shows a P0627 code, as it can lead to stalling or other performance issues that could compromise safety.
How can I diagnose P0627 myself using GeekOBD APP?
Using the GeekOBD APP, scan for diagnostic trouble codes and analyze freeze frame data. This will give you context about the issue, allowing you to check for related codes or performance issues.
What vehicles are most commonly affected by P0627?
Vehicles like the 2010 Ford F-150, 2012 Chevrolet Silverado, and 2011 Dodge Ram are frequently reported with P0627 codes, often due to similar fuel system designs.
How can I prevent P0627 from happening again?
Regular maintenance, including inspections of the fuel system wiring and connections, can help prevent future occurrences of P0627. Keeping your vehicle's software updated is also advisable.
What is P0627?
The diagnostic trouble code (DTC) P0627 indicates a malfunction in the fuel pump control module circuit. This code is often encountered in various Ford, Chevrolet, and Dodge models, particularly those from the late 2000s to early 2010s. The fuel pump control module is responsible for managing the operation of the fuel pump, ensuring that the engine receives the optimal amount of fuel for combustion. When the engine control unit (ECU) detects a fault in the signal sent from the fuel pump control module, it triggers the P0627 code. This can lead to several issues, including engine stalling, difficulty starting the vehicle, or poor fuel efficiency. For instance, owners of the 2010 Ford F-150 or the 2012 Chevrolet Silverado may notice that their vehicles struggle to maintain proper fuel pressure, which can severely impact performance. Ignoring this code can lead to further complications, including damage to the fuel system or engine. Therefore, it is crucial to address the underlying issues promptly to avoid costly repairs down the line.
System: P - Powertrain (Engine, Transmission, Emissions)
Symptoms
Common symptoms when P0627 is present:
- The check engine light illuminates, and may stay on constantly, indicating a fault that needs urgent attention.
- Engine may hesitate or stall during acceleration, which can make driving dangerous, especially in high-traffic situations.
- Fuel economy may decrease by approximately 10-15%, leading to increased costs at the pump.
- Difficulties starting the engine may arise, with the vehicle cranking but failing to start intermittently.
- Unusual noises from the fuel pump area may be noticed, such as whining or buzzing sounds, indicating potential pump failure.
Possible Causes
Most common causes of P0627 (ordered by frequency):
- A faulty fuel pump control module is the most common cause, with a likelihood of around 60%. This component can fail due to age or electrical issues.
- Wiring issues such as damaged or corroded wires can also trigger the P0627 code, accounting for about 25% of cases. Corroded connectors can impede electrical flow.
- A malfunctioning engine control unit (ECU) can lead to incorrect signals being sent to the fuel pump module, representing a 10% chance of causing the code.
- Less common causes include fuel pump failure, which might not always be related to the control module but can lead to similar symptoms.
- In rare cases, software glitches within the ECU may require a software update or reprogramming, which is less frequent but possible.
P0627 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: $300 - $600
- Success rate: 85%
Wiring Repair
Repairing or replacing damaged wiring in the fuel pump circuit.
- Total: $100 - $300
- Success rate: 90%
Money-Saving Tips for P0627
- 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 P0627 Diagnosis Process
Follow these systematic steps to accurately diagnose P0627. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 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: Component testing - Use a multimeter or specific diagnostic tools to test the fuel pump control module and associated circuits (20-30 minutes)
Step 4: System function test - Verify proper operation of the fuel pump after repairs and clear error codes (10-15 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure no new codes appear (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: 2010 Ford F-150 Fuel Pump Module Replacement
Vehicle: 2010 Ford F-150, 85,000 miles
Problem: Customer reported engine stalling and check engine light on.
Diagnosis: Scanned for codes using GeekOBD APP and confirmed P0627. Conducted visual inspection and confirmed damaged fuel pump control module.
Solution: Replaced the fuel pump control module and cleared codes. Ensured proper wiring connection.
Cost: $450 (parts: $300, labor: $150)
Result: Vehicle ran smoothly after the repair, with no recurring codes.
Case Study 2: 2012 Chevrolet Silverado Wiring Repair
Vehicle: 2012 Chevrolet Silverado, 75,000 miles
Problem: Customer experienced difficulty starting and poor fuel efficiency.
Diagnosis: P0627 confirmed through OBD scan. Visual inspection revealed corroded wiring in the fuel pump circuit.
Solution: Repaired wiring harness and connections to the fuel pump control module.
Cost: $200 (parts: $50, labor: $150)
Result: Customer reported improved starting and fuel economy after repairs.