Fuel Pump Module Control Circuit High
The P025D code indicates that the Powertrain Control Module (PCM) has detected a voltage higher than expected in the fuel pump module control circuit. This circuit controls the fuel pump relay or the fuel pump driver module. High voltage can be caused by a short to power, a faulty fuel pump module, or a PCM issue. This can lead to erratic fuel pump operation, potentially causing drivability problems.
1. Most Common Causes
- Faulty fuel pump module (FPM)
- Short to voltage in the control circuit wiring
- Corroded, loose, or poor ground electrical connections
- Faulty fuel pump relay or fuse
- Defective engine control module (ECM/PCM)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine may stall or have difficulty starting
- Reduced fuel economy or performance
- 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 related codes.
Step 2: Visually inspect the fuel pump module wiring and connectors for damage or corrosion.
Step 3: Test the fuel pump control circuit voltage with a multimeter to identify a short to power.
Step 4: Check the fuel pump relay and module for proper operation; replace if faulty.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended as the fuel pump may fail unexpectedly, causing the engine to stall or not start, which could be dangerous.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150, and repairs can range from $100 for a relay to $500+ for a fuel pump module replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.