Fuel Pump Module Control Circuit/Open
The P025A code indicates a malfunction in the fuel pump module control circuit, typically caused by an open or short circuit in the wiring or connector, a faulty fuel pump module, or a defective engine control module (ECM). This circuit controls the fuel pump relay or fuel pump driver, and when open, the fuel pump may not receive power, leading to insufficient fuel pressure.
1. Most Common Causes
- Open fuel pump power circuit (blown fuse, faulty relay, broken wiring)
- Open or high-resistance ground circuit in the fuel pump module
- Open control signal circuit (PWM/command) between PCM and FPCM
- Damaged, corroded, or disconnected connectors at the fuel pump module or PCM
- Internally faulty fuel pump control module (FPCM)
- Faulty PCM/ECM (rare)
2. Symptoms You Will Notice
- Engine cranks but does not start
- Loss of power or hesitation during acceleration
- Fuel pump does not prime when key is turned on
- Check Engine Light illuminated
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to verify the code and check for related codes (e.g., P0230).
Step 2: Inspect the fuel pump module control circuit wiring and connectors for damage, corrosion, or loose connections.
Step 3: Test the fuel pump module control circuit for continuity and voltage using a multimeter.
Step 4: Check the fuel pump relay and fuse; replace if faulty.
Step 5: If circuit and relay are good, test the fuel pump module itself; replace if defective.
Step 6: If all else fails, test the ECM output to the fuel pump module; consider ECM replacement if faulty.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The vehicle may stall or fail to start, leading to a breakdown or accident.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnostic and minor repairs like wiring or relay replacement, but can be higher if the fuel pump module or ECM needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.