Fuel Pump Control Module Malfunction
The P064A code indicates a malfunction in the Fuel Pump Control Module, which manages the fuel pump's operation based on signals from the PCM. This module regulates fuel pressure and delivery. When it fails, the engine may not receive adequate fuel, leading to performance issues or no-start conditions.
1. Most Common Causes
- Internal failure of the fuel pump control module (FPCM)
- Damaged, corroded, or poorly connected wiring in the FPCM circuit
- Moisture, corrosion, or damaged pins in the FPCM connector
- Defective fuel pump fuse or relay
- Fuel pump failure that overloads the control module
- Ground circuit issue in the FPCM wiring
- Interrupted CAN/LIN communication between the ECM and FPCM
2. Symptoms You Will Notice
- Engine cranks but won't start
- Engine stalling
- Reduced engine power
- Check Engine Light on
3. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P064A is present.
Step 2: Inspect wiring and connectors to the fuel pump control module for damage or corrosion.
Step 3: Test fuel pressure with a gauge to confirm proper operation.
Step 4: Check for power and ground at the control module; if missing, repair circuit.
Step 5: If all else is fine, replace the fuel pump control module.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it can cause stalling or no-start, leading to unsafe driving conditions.
How much does it cost to fix?▼
Typically $200-$600 including parts and labor, depending on vehicle and module location.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.