What is P2401 fault code and why does it matter? What causes the Evaporative Emissions Pump Control Circuit Low error code How can you fix the P2401 fault code What are the symptoms and causes for the P2401 fault code
What is the P2401? What is the Fault Code? What does it signify?
The evaporative emissions system (EVAP), prevents fuel vapors being released into the atmosphere. Through hoses or pipes, fuel vapors are stored in an element called a canister container. If the engine is in operation and there are suitable conditions, the relief valve opens. The fuel vapors then get sucked into engine and burnt.
The EVAP system performs a variety tests to detect leaks or blockages. The powertrain control module, or PCM, inspects the leak detection pumps (LDP) during testing for any electrical or mechanical problems. LDP serves the main purpose of pressurizing the fuel system to prevent leakage. The PCM closes and pumps air to the fuel system.
If the PCM detects an EVAP leak detector pump that is not being activated inadvertently, or detects a low-voltage signal in its circuits, it stores a fault code P2401 and activates check engine light.
There are many vehicles that can be affected by the P2401 fault code, including, but not limited, to models of Toyota, BMW and Hyundai, Ssangyong.
What causes the P2401 Fault code?
Here are some reasons why P2401 should be set.
- – Leak detection pump sensor circuit connectors that are loose or frayed.
- – A defective EVAP pump or control valve
- – A defective EVAP vent or solenoid for purge control
- – Filter clogged in EVAP leak detection pump
- – Clogged EVAP System
- – Leaks in EVAP systems
- – Fuel tank cap incorrectly or deficiently installed
- – Broken or clogged canister canister
- – Vacuum or fuel vapor hoses that are cracked or broken
- – Defective EVAP pressure sensor
- – The PCM is not functioning properly or needs to be updated (rarely).
What are the symptoms of P2401 Fault code?
These symptoms may be present in vehicles with code P2401.
- – Illumination for check engine light
- – There may be fuel smell in some cases
- – Slight decrease in engine performance
- – A slight increase in fuel consumption
- – Setting related fault codes
How do I fix the P2401 fault code?
There are several repairs that can resolve the P2401 fault code.
- Repair damaged cables and replace loose or rusty connectors
- – Replacing a faulty leak detection system and/or clogged filters
- How to replace a damaged canister canister
- – Replacing a damaged pressure control valve
- – Replacing a faulty EVAP control solenoid
- – Replacing a faulty EVAP sensor
- – Inspect the fuel tank cap and replace it if it is damaged.
- – Detection and repair of leaks in the EVAP systems
- – Repairing or cleaning EVAP tubing damaged, cracked, or clogged
- – If the PCM is defective, reprogramming or replacement (rarely)
How serious is the P2401 Fault code?
This code has a medium severity. While there won’t be any deviation in car drivability, harmful gases will still be released into the atmosphere once the code has been set. This could cause you to fail an exhaust emission test.
