Monitor Description
WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
If the fuel pressure (for high pressure side) increases despite a decrease request signal being sent to the fuel (engine room side) pump assembly (for high pressure side) by the ECM, the ECM will illuminate the MIL and store this DTC.