• Check Engine Light is on
• Possible fuel odor
• Failed emissions test
• Faulty leak detection pump
• Damaged or corroded wiring/connectors
• Faulty sensor in the EVAP system
EVAP: Evaporative Emission Control
PCM: Powertrain Control Module
• P2400
• P2401
EVAP System Leak Detection Pump Sense Circuit Low
This code means that the car's computer has detected a problem with the part of the system that checks for leaks in the fuel system. It's like a sensor that helps find leaks isn't working right.
The P2405 code is triggered when the vehicle's powertrain control module (PCM) detects a low voltage signal from the EVAP system's leak detection pump sensor circuit.
The EVAP (Evaporative Emission Control) system is responsible for capturing fuel vapors from the fuel tank and preventing them from escaping into the atmosphere. The leak detection pump is a component of this system that pressurizes the system to check for leaks. The P2405 code indicates that the sensor circuit associated with this pump is reporting a voltage lower than expected, which could mean a wiring issue, a faulty sensor, or a problem with the pump itself.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the leak detection pump for proper operation.
• Repair or replace damaged wiring/connectors.
• Replace the faulty leak detection pump.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $400
Moderate
• Toyota Camry
• Volkswagen Jetta
• Ford Focus
• Regularly inspect and maintain the EVAP system.
• Ensure fuel cap is properly secured.
• Avoid overfilling the fuel tank.
Sensor Issue
• Do not ignore the Check Engine Light.
• Seek professional diagnosis if unsure.
• Regular maintenance can prevent such issues.
Check with your vehicle's manufacturer for warranty coverage on emissions-related components.
The P2405 code has been more commonly reported in vehicles with aging EVAP systems, particularly in models over 5 years old.
Moderate – While not immediately critical, it should be addressed to avoid emissions problems and potential fuel vapor leaks.
Driving with an active Check Engine Light may result in failing emissions tests and could potentially lead to more serious issues if not addressed.
• Vehicle must be in closed-loop mode.
• Fuel tank should be between 15% and 85% full.
The leak detection pump is typically located near the fuel tank or within the EVAP canister assembly.
Q: Can I drive with a P2405 code?
A: Yes, but it's best to get it checked soon to avoid potential emissions issues.
Q: Will a P2405 code affect my car's performance?
A: It may not affect performance directly, but it can cause emissions problems and a persistent Check Engine Light.
