DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (2GR-FKS) - Diagnostic Codes (4 Of 6) >> SFI System >> DTC P0455-00: Evaporative Emission System Leak Detected (Large Leak); DTC P0456-00: Evaporative Emission System Leak Detected (Very Small Leak) [12/2019 - 10/2022] >> DTC Summary

DTC Summary

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P0455-00 Evaporative Emission System Leak Detected (Large Leak) Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. Reference pressure is measured at start and end of leak check.
If stabilized pressure is higher than [second reference pressure x 0.2], ECM determines that EVAP system has a large leak.
  • Fuel tank cap (loose)
  • Leakage from EVAP line (canister - fuel tank)
  • Leakage from EVAP line (purge VSV - canister)
  • Leakage from canister pump module
  • Leakage from fuel tank
  • Leakage from canister
Comes on DTC stored SAE Code: P0455
DTC for Mexico Models:
- Does not apply
P0456-00 Evaporative Emission System Leak Detected (Very Small Leak) Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. Reference pressure measured at start and end of leak check.
If stabilized pressure is higher than second reference pressure, ECM determines that EVAP system has a small leak.
  • Fuel tank cap (loose)
  • Leakage from EVAP line (canister - fuel tank)
  • Leakage from EVAP line (purge VSV - canister)
  • Leakage from canister pump module
  • Leakage from fuel tank
  • Leakage from canister
Comes on DTC stored SAE Code: P0456
DTC for Mexico Models:
- Does not apply
DTC No. Monitoring Item Detection Timing Detection Logic SAE
P0455-00 EVAP gross leak EVAP monitoring
(ignition switch off)
2 trip P0455
P0456-00 EVAP small leak P0456