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Home >> Lexus >> 2007 >> GX 470 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC P0657 - P2A03 >> DTC P2419, P2420: Evaporative Emission Pressure Switching Valve Stuck ON; Evaporative Emission Pressure Switching Valve Stuck OFF >> DTC Summary

DTC Summary

DTC SUMMARY

DTC No. Monitoring Items Malfunction Detection Conditions Trouble Areas Detection Timing Detection Logic
P2419 Vent valve stuck closed Vacuum pump creates negative pressure through 0.02 inch orifice and EVAP system pressure measured to determine leak pressure standard. If system pressure higher than -1.06 kPa (-7.95 mmHg)(1) 4 seconds after vacuum pump turned ON, ECM determines that vent valve stuck closed.
  • Pump module
  • Connector / Wire harness (Pump module - ECM)
  • ECM
 Ignition switch OFF 2 trip
P2420 Vent valve stuck open (vent) Vacuum pump creates negative pressure through 0.02 inch orifice and EVAP system pressure measured to determine leak pressure standard. 0.02 inch leak pressure standard is measured at the start and at the end of the leak check.
If system pressure does not increase by more than 0.3 kPa (2.25 mmHg) within 10 seconds when vent valve turned ON, ECM determines that vent valve stuck closed.
  • Pump module
  • Connector / Wire harness (Pump module - ECM)
  • ECM
 Ignition switch OFF 2 trip
(1) The threshold valve varies according to the atmospheric presser measured in operation A. The value described above is based on an atmospheric pressure of 100 kPa (750.1 mmHg): absolute pressure.

HINT:

The vent value is built into the pump module.

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