DTC P26C5-18: Exhaust Flow Control Valve "A" Control Circuit Low Circuit Current Below Threshold; DTC P26C5-19: Exhaust Flow Control Valve "A" Control Circuit High Circuit Current Above Threshold [09/2024 - ]: Wiring Diagram
WARNING: This page is about a different car, the 2025 Toyota GR Corolla, 2024 Toyota GR Corolla, and 2023 Toyota GR Corolla. However, it is still accessible from the selected car via links, so may be relevant.