P0625: Fuel Pump ""A"" Control Circuit Low

Definition

The OBD2 code P0625 indicates a low voltage condition in the fuel pump "A" control circuit, which may affect the operation of the fuel pump

Common causes

Faulty fuel pump
Damaged wiring or connectors
Failed fuel pump relay
Bad engine control module (ECM)
Poor ground connection
Blown fuse
Corroded terminals

Common misdiagnoses

Faulty fuel pump
Bad fuel pump relay
Wiring issues or shorts in the circuit
Faulty engine control module (ECM)
Fuel pressure regulator problems
Clogged fuel filter
Incorrect fuel level sensor readings
Battery or charging system issues

Troubleshooting steps

1. Check the Code

Use an OBD-II scanner to confirm the P0625 code and check for any additional codes that may provide more context about the issue
2. Inspect the Fuel Pump Relay
3. Locate the fuel pump relay in the fuse box
4. Check for any signs of damage or corrosion
5. Test the relay by swapping it with a similar relay (if available) to see if the problem persists
6. Examine the Fuel Pump Fuse
7. Check the fuse associated with the fuel pump circuit
8. Replace any blown fuses and see if the code returns
9. Inspect Wiring and Connectors
10. Visually inspect the wiring and connectors leading to the fuel pump and the fuel pump control module
11. Look for frayed wires, corrosion, or loose connections that could cause a poor electrical connection
12. Test Voltage at the Fuel Pump
13. Use a multimeter to measure the voltage at the fuel pump connector while the ignition is in the "ON" position (but the engine is not running)
14. You should see battery voltage (around 12V). If the voltage is low or absent, there may be an issue with the wiring or the control module
15. Check the Fuel Pump
16. If the wiring and connections are good, the fuel pump itself may be faulty
17. You can test the fuel pump by applying direct power to it to see if it operates. If it does not, the pump may need to be replaced
18. Inspect the Fuel Pump Control Module
19. If applicable, check the fuel pump control module for faults
20. Test the module for proper operation and replace it if necessary
21. Scan for Additional Codes
22. If you find and fix any issues, clear the codes and take the vehicle for a test drive to see if the P0625 code returns
23. Monitor for any other related codes that may indicate further issues
24. Consult Repair Manual
25. Refer to the vehicle's repair manual for specific wiring diagrams and troubleshooting procedures related to the fuel pump circuit
26. Seek Professional Help
27. If you are unable to diagnose or fix the issue, consider taking the vehicle to a qualified mechanic or automotive technician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the P0625 code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check the Code

2. Inspect the Fuel Pump Relay

3. Locate the fuel pump relay in the fuse box

4. Check for any signs of damage or corrosion

5. Test the relay by swapping it with a similar relay (if available) to see if the problem persists

6. Examine the Fuel Pump Fuse

7. Check the fuse associated with the fuel pump circuit

8. Replace any blown fuses and see if the code returns

9. Inspect Wiring and Connectors

10. Visually inspect the wiring and connectors leading to the fuel pump and the fuel pump control module

11. Look for frayed wires, corrosion, or loose connections that could cause a poor electrical connection

12. Test Voltage at the Fuel Pump

13. Use a multimeter to measure the voltage at the fuel pump connector while the ignition is in the "ON" position (but the engine is not running)

14. You should see battery voltage (around 12V). If the voltage is low or absent, there may be an issue with the wiring or the control module

15. Check the Fuel Pump

16. If the wiring and connections are good, the fuel pump itself may be faulty

17. You can test the fuel pump by applying direct power to it to see if it operates. If it does not, the pump may need to be replaced

18. Inspect the Fuel Pump Control Module

19. If applicable, check the fuel pump control module for faults

20. Test the module for proper operation and replace it if necessary

21. Scan for Additional Codes

22. If you find and fix any issues, clear the codes and take the vehicle for a test drive to see if the P0625 code returns

23. Monitor for any other related codes that may indicate further issues

24. Consult Repair Manual

25. Refer to the vehicle's repair manual for specific wiring diagrams and troubleshooting procedures related to the fuel pump circuit

26. Seek Professional Help

27. If you are unable to diagnose or fix the issue, consider taking the vehicle to a qualified mechanic or automotive technician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the P0625 code