Typical Malfunction Thresholds
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. 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 |