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P2405 is a diagnostic trouble code (DTC) for "EVAP Leak Detection Pump Control Circuit Low". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
Evaporative Emission Control System (EVAP) Leak Detection Pump Control Circuit Low
P2405 is an OBD-II generic code for the Engine Control Module (ECM) detecting that the evaporative system leak detection pump control circuit has a low voltage signal return.
The ECM monitors the evaporative control system pump current. If the current goes lower than specified then the code is set.
The EVAP system pump is drawing too little amps or an open circuit in the power circuit.
The system to control the pump motor has a shorted wire harness causing low return voltage.
The Check Engine Light will be illuminated and the code is set in the ECM memory as a fault.
The vehicle will not run any different in most cases.
The vehicle may have a blown circuit fuse to the pump power relay.
The vehicle will fail emission testing.
Try to scan for codes and document the codes in the ECM and look at the freeze frame data for the problem before clearing the codes and retesting.
Test the pump connector for issues causing an opening in the wiring.
Test the resistance of the pump and check its specification.
Test wiring for open circuits between the power supply and pump.
Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired.
Failing to clear the ECM codes after the codes are fixed.
Failing to verify the failure before replacing the parts.
Code P2405 is an indication that the evaporative pump is open internally. Other than failing the emission test and the check engine light being on, this code should not cause any drivability problems.
Replace the EVAP pump and fuse if it got blown.
Repair the EVAP pump connector pins for corrosion, melted or loose connections causing the open circuit.
Replace the EVAP pump relay if it has an open coil.
Code P2405 is for the EVAP pump not drawing enough amperage as specified. This is common on higher mileage vehicles after the pump is worn out or if the pump relay contact shorts and running the motor continuously will burn the pump out. Test for this when replacing the bad pump.
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