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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 171 (Engine Control System - SFI System Diagnostics (2 Of 4)) >> DTC P0455 Evaporative Emission Control System Leak Detected (Gross Leak); DTC P0456 Evaporative Emission Control System Leak Detected (Very Small Leak) >> DTC Summary

DTC Summary

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
DTC SUMMARY CHART

DTC No Monitoring Item Malfunction Detection Condition Trouble Area Detection Timing Detection Logic
P0455 EVAP gross leak Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure measured Reference pressure measured at start and at end of leak check
If stabilized pressure higher than [second reference pressure x 0 32], ECM determines that EVAP system has large leak
  • Fuel tank cap (loose)
  • Leaks from EVAP line (Canister - Fuel tank)
  • Leaks from EVAP line (Purge VSV - Canister)
  • Canister pump module
  • Leaks from fuel tank
  • Leaks from canister
While engine switch off 2 trip
P0456 EVAP small leak Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure measured Reference pressure measured at start and at end of leak check
If stabilized pressure higher than second reference pressure, ECM determines that EVAP system has small leak
  • Fuel tank cap (loose)
  • Leaks from EVAP line (Canister - Fuel tank)
  • Leaks from EVAP line (Purge VSV - Canister)
  • Canister pump module
  • Leaks from fuel tank
  • Leaks from canister
While engine switch off 2 trip