Monitor Description

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

These DTCs are stored if an open or short in the EGR valve assembly circuit is detected.

Example:

If the EGA+, EGA-, EGB+ or EGB- operation signal is off, but the step motor output signal is on, the ECM determines that there is a short in the EGR valve assembly circuit, and stores a DTC P0403-19 or P1400-19.
If the EGA+, EGA-, EGB+ or EGB- operation signal is on, and the step motor output signal is off, the ECM determines that there is an open or short in the EGR valve assembly circuit, and stores a DTC P0403-18 or P1400-18.