P1644 Ford Code - Fuel Pump Speed Control Circuit Malfunction
Quick Answer
The P1644 Ford diagnostic trouble code indicates a malfunction in the fuel pump speed control circuit. Common causes include Faulty fuel pump speed control module: The module responsible for controlling the fuel pump speed may be malfunctioning, causing the circuit to fail, Damaged wiring or connectors: Corrosion, fraying, or damage to the wiring or connectors in the fuel pump speed control circuit can disrupt the signal and trigger the code, Malfunctioning fuel pump speed control sensor: The sensor that monitors the fuel pump speed may be faulty, leading to inaccuracies in fuel delivery. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1644 Ford indicates Fuel Pump Speed Control Circuit Malfunction.
- Common causes
- Common causes include Faulty fuel pump speed control module: The module responsible for controlling the fuel pump speed may be malfunctioning, causing the circuit to fail, Damaged wiring or connectors: Corrosion, fraying, or damage to the wiring or connectors in the fuel pump speed control circuit can disrupt the signal and trigger the code, Malfunctioning fuel pump speed control sensor: The sensor that monitors the fuel pump speed may be faulty, leading to inaccuracies in fuel delivery.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1644 Ford Description
The P1644 Ford diagnostic trouble code indicates a malfunction in the fuel pump speed control circuit. In modern vehicles, the fuel pump speed control system regulates the speed of the fuel pump to ensure optimal fuel delivery to the engine. This system plays a crucial role in maintaining the proper fuel pressure and flow rate required for efficient engine performance.
Common Causes of P1644 Ford
- Faulty fuel pump speed control module: The module responsible for controlling the fuel pump speed may be malfunctioning, causing the circuit to fail.
- Damaged wiring or connectors: Corrosion, fraying, or damage to the wiring or connectors in the fuel pump speed control circuit can disrupt the signal and trigger the code.
- Malfunctioning fuel pump speed control sensor: The sensor that monitors the fuel pump speed may be faulty, leading to inaccuracies in fuel delivery.
- ECM issues: Problems with the Engine Control Module, such as software glitches or hardware failure, can also trigger this code.
Symptoms of P1644 Ford
- Engine hesitation or stalling: A malfunctioning fuel pump speed control circuit can cause the engine to hesitate or stall, especially under heavy acceleration or at high speeds.
- Reduced fuel efficiency: The engine may consume more fuel than usual due to improper fuel delivery, resulting in decreased fuel efficiency.
- Engine misfires: Erratic fuel pump operation can lead to engine misfires, causing rough idling or poor acceleration.
- Check Engine Light: The illumination of the Check Engine Light on the dashboard is a common symptom associated with this code.
How to Fix P1644 Ford
- Diagnose the issue: Use a diagnostic scanner to retrieve the trouble codes and perform a thorough inspection of the fuel pump speed control circuit to identify the root cause of the problem.
- Replace faulty components: Replace any faulty components identified during the diagnosis, such as the fuel pump speed control module, sensor, or damaged wiring.
- Clear trouble codes: After replacing the faulty components, clear the trouble codes from the ECM memory to reset the system.
- Test drive: Test drive the vehicle to ensure that the issue has been resolved and that the engine operates smoothly without any symptoms.
Cost to Fix P1644 Ford
The cost of repairing a P1644 Ford code can vary depending on the specific cause of the issue and the parts required for the repair. On average, the repair cost for this code can range from $200 to $500, including parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check with local auto repair shops for a more accurate estimate based on your specific situation.
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