DTC P0688-1F: ECM/PCM Power Relay Sense Circuit Intermittent [08/2023 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
This DTC indicates that the hybrid vehicle control ECU detected an instantaneous interruption in +B power source voltage.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| P0688-1F | ECM/PCM Power Relay Sense Circuit Intermittent | When the ignition switch is ON (READY), the hybrid vehicle control ECU is reset due to an instantaneous interruption of power source. (1 trip detection logic) |
|
Comes on | Master Warning: Comes on |
Hybrid Control | A | SAE Code: P2511 |