What Does P064A Mean?
The fuel pump control module (FPCM) has an internal malfunction or communication error. The ECM has detected that the dedicated module controlling fuel pump speed and pressure is not operating within expected parameters. The driver may experience hard starting, stalling, loss of power under acceleration, or in severe cases, a no-start condition.
Safety Warning
This can cause sudden loss of engine power, stalling at highway speeds, or a no-start condition. Do not drive extended distances. The engine may stall without warning in traffic. Have this repaired immediately.
Common Causes
35%
Failed fuel pump control module (internal electronics failure)
25%
Corroded or damaged wiring/connector at the FPCM (often mounted near fuel tank, exposed to moisture)
15%
Poor ground connection for the fuel pump control module
15%
CAN bus communication fault between ECM and FPCM
10%
Low battery voltage or faulty power supply to FPCM
Diagnostic Steps
1
Check for additional U-codes (communication faults) that may indicate a broader CAN bus issue. Verify battery voltage is above 12.4V with engine off and 13.5-14.7V with engine running.
2
Locate the fuel pump control module (typically near the fuel tank or under the rear seat). Inspect the connector for corrosion, water intrusion, bent pins, or heat damage.
3
Measure the power supply and ground at the FPCM connector with a multimeter. Verify B+ voltage is within 0.5V of battery voltage, and ground resistance is less than 0.5 ohms.
4
Using a scan tool, attempt to communicate directly with the FPCM. If no communication is possible, verify CAN bus high and low wires at the FPCM connector show proper voltage (CAN-H ~2.5-3.5V, CAN-L ~1.5-2.5V with key on).
5
Monitor fuel pump duty cycle and fuel rail pressure with the scan tool while commanding various pump speeds. Compare actual rail pressure to commanded pressure to verify FPCM responsiveness.
6
If all external circuits test good and the module still does not communicate or respond, replace the FPCM. Some vehicles require module programming after replacement.
Estimated Repair Cost
$300 - $1,200
Parts + labor, varies by vehicle and location
The fuel pump control module (FPCM) has an internal malfunction or communication error. The ECM has detected that the dedicated module controlling fuel pump speed and pressure is not operating within expected parameters. The driver may experience hard starting, stalling, loss of power under accelera...
The most common cause of P064A (Fuel Pump Control Module) is: Failed fuel pump control module (internal electronics failure)
Typical repair costs for P064A range from $300 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This can cause sudden loss of engine power, stalling at highway speeds, or a no-start condition. Do not drive extended distances. The engine may stall without warning in traffic. Have this repaired immediately.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P064A to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
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