Home >> Lexus >> 2007 >> GX 470 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC P0657 - P2A03 >> DTC P1442, P1445, P2441: Stuck Close in Secondary Air Injection Vacuum Switching Valve Bank 1; Stuck Close in Secondary Air Injection Vacuum Switching Valve Bank 2; Secondary Air Injection System Switching Valve Stuck Close Bank 1 >> Monitor Description