Fuel Pump Module Control Circuit Range/Performance
The P025B code indicates that the Engine Control Module (ECM) has detected a malfunction in the fuel pump module control circuit, specifically that the voltage or signal from the fuel pump control module is outside the expected range or not performing correctly. This can be caused by a faulty fuel pump control module, wiring issues, or a defective fuel pump. The ECM monitors the fuel pump control circuit for proper voltage and response; when it sees an anomaly, it sets this code.
1. Most Common Causes
- Faulty fuel pump control module
- Open or shorted wiring in the fuel pump control circuit
- Corroded or loose electrical connectors
- Defective fuel pump
- Failed ECM (rare)
2. Symptoms You Will Notice
- Engine cranks but does not start
- Engine stalls or hesitates during acceleration
- Check Engine Light illuminated
- Reduced fuel economy
- Fuel pump running continuously or not at all
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for additional codes.
Step 2: Visually inspect the fuel pump control module and wiring for damage, corrosion, or loose connections.
Step 3: Test the fuel pump control module power and ground circuits with a multimeter.
Step 4: Check fuel pump operation by listening for a hum when key is turned to ON position.
Step 5: If wiring and module are okay, test the fuel pump itself for proper resistance and operation.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The vehicle may stall unexpectedly or fail to start, leading to a potential accident or being stranded.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and minor repairs like connector cleaning, but if the fuel pump control module or fuel pump needs replacement, costs can be $200-$600 or more.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.