Engine code P2401 is triggered when the Engine Control Module (ECM) detects a leak in the detection pump within the EVAP control circuit. The EVAP system is the anchor that regulates system pressure and gas flow in the engine.
How do I fix code P2401?
What repairs can fix the P2401 code?
- Gas cap is tested and replaced.
- Charcoal canister replaced.
- Leaking or cracked fuel vapor lines replaced.
- Repairing or replacing the wiring harness.
- ECM replaced as needed.
- Faulty purge control solenoid replaced.
- Leak detection pump replaced.
How do I fix error code P2402?
What repairs can fix the P2402 code?
- Replace the evaporative pump and fuse.
- Replace the evaporative pump relay.
- Repair the evaporative pump connector pins for corrosion, melted, or loose connections.
How does leak detection pump work?
It pumps air into the EVAP system to develop a pressure of about 7.5′ H20(1/4) psi. A reed switch in the LDP allows the PCM to monitor the position of the LDP diaphragm. The PCM uses the reed switch input to monitor how fast the LDP is pumping air into the EVAP system. This allows detection of leaks and blockage.
What does code P043E mean?
OBD-II Code P043E is defined as a Evaporative Emission System Leak Detection Reference Orifice. The Leak Detection Pump contains a reference orifice tube. This tube restricts airflow to create a difference of pressure in the EVAP system.
What causes incorrect purge flow?
The main cause is a faulty purge valve. Other common causes include a disconnected or clogged purge line, circuit issues like loose connections or damaged wires, or problems with the control module. Other problems with the EVAP system could also cause issues with the purge flow.
What is code P2419?
OBD-II Code P2419 is defined as a Evaporative Emission System Switching Valve Control Circuit Low. The Leak Detection Pump is part of the Evaporative Emissions System.
What is a code P2402 mean?
Evaporative Emission System Leak Detection Pump Control Circuit
OBD-II Code P2402 is defined as a Evaporative Emission System Leak Detection Pump Control Circuit. The Leak Detection Pump is part of the Evaporative Emissions System. After the vehicle has been sitting for a few hours, this pump will turn on and create a vacuum in the EVAP system.
What does P2404 mean?
OBD-II Code P2404 is defined as a Evaporative Emission System Leak Detection Pump Sense Circuit. The Evaporative Emission System (EVAP) vents fuel vapors from the tank to the intake manifold so the vapors are burned through the engine’s normal combustion process.
How do I fix error code P2419?
To solve any issue you need to follow certain steps, and to solve OBD error code P2419, you will need to undergo the following replacements:
- EVAP leak detection pump.
- EVAP purge valves.
- EVAP purge solenoids.
- EVAP pressure sensor and pump circuit wiring and connectors.
- Fuel cap and pressure sensor.
- PCM reprogramming.
How do I know if my leak detection pump is bad?
If the Check Engine Light has lit up and thrown a trouble code, a diagnostic check with a code scanner can pinpoint the general cause of the problem. If the cause is a bad evaporative leak detection pump, the bad one can be removed from your car, and then replaced with a new evaporative leak detection pump.
How do you test a Dodge leak detection pump?
Hold the LDP in the same orientation as it would be mounted in the vehicle. Blow through the canister side port, filling the balloon, and release pressure slowly.