P2401

4GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P043E: Evaporative Emission System Reference Orifice Clog Up

DTC P043E - Evaporative Emission System Reference Orifice Clog Up

DTC P043F - Evaporative Emission System Reference Orifice High Flow

DTC P2401 - Evaporative Emission System Leak Detection Pump Control Circuit Low

DTC P2402 - Evaporative Emission System Leak Detection Pump Control Circuit High

DTC P2419 - Evaporative Emission System Switching Valve Control Circuit Low

DTC SUMMARY

DESCRIPTION

The circuit description can be found in the EVAP (Evaporative Emission) System EVAP System.

INSPECTION PROCEDURE

Refer to the EVAP System EVAP System.

MONITOR DESCRIPTION

5 hours* after the engine switch is turned off, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.
HINT:
*: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the engine switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the engine switch is turned off, the monitor check starts 2.5 hours later.

HINT:
*: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.

1 The leak defection pump creates negative pressure through the reference orifice. When the system is normal, the EVAP pressure between 724 to 752 mmHg* and saturated within a minute. If not, the ECM interpets this as a malfunction. The ECM will illuminate the MIL and set a DTC is this malfunction is detected in consecutive drive cycles.
*: Typical value.