DTC P1CFA-12: IGB Signal Circuit Short to Auxiliary Battery [10/2018 - ]: Description
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.
The hybrid vehicle control ECU monitors the IGB signal received from the certification ECU (smart key ECU assembly). When an error is detected in the ST signal, this DTC is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P1CFA12 | IGB Signal Circuit Short to Auxiliary Battery | An IGB signal from the hybrid vehicle control ECU is on when the power switch is off. (1 trip detection logic) |
|
Does not come on | Master Warning: Comes on |