DTC P0840-87: Transmission Fluid Pressure Sensor/Switch "A" Missing Message [09/2023 - ]: Description
WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
The TCM performs wet start clutch (WSC) control based on oil pressure signals detected by the oil pressure sensor.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|
| P0840-87 | Transmission Fluid Pressure Sensor/Switch "A" Missing Message | Oil pressure sensor lost communication is detected in the TCM for 1 second (1-trip detection logic). |
|
Comes on | Transmission | B | SAE: P0840 |