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Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 156 (Engine Control System (A25A-FXS) (W/ Canister Pump Module) - Diagnostic Codes (10 Of 13)) >> SFI SYSTEM (w/ Canister Pump Module) >> DTC P1422-00: Evaporative Emission Fuel Tank (Small Leak); DTC P1423-00: Evaporative Emission Fuel Tank (Gross Leak) [02/2019 - 06/2020] >> DTC Summary

DTC Summary

WARNING: This page is about a different variant/trim than selected.
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P1422-00 Evaporative Emission Fuel Tank (Small Leak) Leak detection pump creates negative pressure (vacuum) in fuel tank and fuel tank pressure is measured. Reference pressure is measured at the start and at end of leak check.
If stabilized pressure is higher than third reference pressure, ECM determines that fuel tank has a small leak.
  • EVAP leak (fuel tank - fuel vapor-containment valve)
  • Fuel vapor-containment valve
  • Connector/wire harness (fuel vapor-containment valve - ECM)
  • ECM
Comes on DTC stored SAE Code: P1422
P1423-00 Evaporative Emission Fuel Tank (Gross Leak) Leak detection pump creates negative pressure (vacuum) in fuel tank and fuel tank pressure is measured. Reference pressure is measured at the start and at end of leak check.
If stabilized pressure is higher than [third reference pressure x 0.2], ECM determines that fuel tank has a large leak.
  • EVAP leak (fuel tank - fuel vapor-containment valve)
  • Fuel vapor-containment valve
  • Connector/wire harness (fuel vapor-containment valve - ECM)
  • ECM
Comes on DTC stored SAE Code: P1423
DTC No. Monitoring Item Detection Timing Detection Logic SAE Code
P1422-00 Fuel tank small leak EVAP monitoring
(ignition switch off)
2 trip P1422
P1423-00 Fuel tank gross leak P1423