Typical Malfunction Thresholds
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.
P0489: EGR A CIRCUIT RANGE CHECK (LOW VOLTAGE)
| Either of the following conditions is met | - |
| Motor phase A positive terminal voltage detected by motor driver IC | 0.2 V or less |
| Motor phase A negative terminal voltage detected by motor driver IC | 0.2 V or less |
P0489: EGR B CIRCUIT RANGE CHECK (LOW VOLTAGE)
| Either of the following conditions is met | - |
| Motor phase B positive terminal voltage detected by motor driver IC | 0.2 V or less |
| Motor phase B negative terminal voltage detected by motor driver IC | 0.2 V or less |
P0490: EGR A CIRCUIT RANGE CHECK (HIGH CURRENT)
| One of the following conditions is met | - |
| Motor phase A positive terminal current detected by motor driver IC | 1.2 A or more |
| Motor driver MOSFET temperature for motor phase A positive terminal detected by motor driver IC | 150°C (302°F) or higher |
| Motor phase A negative terminal current detected by motor driver IC | 1.2 A or more |
| Motor driver MOSFET temperature for motor phase A negative terminal detected by motor driver IC | 150°C (302°F) or higher |
P0490: EGR B CIRCUIT RANGE CHECK (HIGH CURRENT)
| One of the following conditions is met | - |
| Motor phase B positive terminal current detected by motor driver IC | 1.2 A or more |
| Motor driver MOSFET temperature for motor phase B positive terminal detected by motor driver IC | 150°C (302°F) or higher |
| Motor phase B negative terminal current detected by motor driver IC | 1.2 A or more |
| Motor driver MOSFET temperature for motor phase B negative terminal detected by motor driver IC | 150°C (302°F) or higher |