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Home >> Lexus >> 2023 >> NX 250 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 108 (Engine Control System - Diagnostic Codes (P21CF-P26CA)) >> SFI System >> DTC P2450-7E: Evaporative Emission System Switching Valve Actuator Stuck On; DTC P2451-7F: Evaporative Emission System Switching Valve Actuator Stuck Off [11/2021 - 03/2022] >> DTC Summary

DTC Summary

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note
P2450-7E Evaporative Emission System Switching Valve Actuator Stuck On Either of the following conditions is met when fuel tank pressure is higher than -2 kPa (gauge) [-0.3 psi (gauge)], and less than 3 kPa (gauge) [0.4 psi (gauge)].
  • Fuel tank pressure change when vacuum introduction for canister is higher than 0.5 kPa [0.07 psi]
  • EVAP pressure when vacuum introduction for canister was complete is higher than (third reference pressure x 0.2)
  • Fuel vapor-containment valve
  • Connector/wire harness (fuel vapor-containment valve - ECM)
  • ECM
Comes on SAE Code: P2450
P2451-7F Evaporative Emission System Switching Valve Actuator Stuck Off Either of the following conditions is met:
  • Fuel tank pressure change when vacuum introduction for canister is less than 0.5 kPa [0.07 psi]
  • EVAP pressure change when fuel vapor-containment valve is open is less than 0.9 kPa [0.1 psi]
  • Fuel vapor-containment valve
  • Connector/wire harness (fuel vapor-containment valve - ECM)
  • ECM
Comes on SAE Code: P2451
DTC No. Monitoring Item Detection Timing Detection Logic SAE Code
P2450-7E Fuel vapor-containment valve stuck open EVAP monitoring
(ignition switch off)
2 trip P2450
P2451-7F Fuel vapor-containment valve stuck close P2451