DTC P0A14-12: Engine Mount "A" Control Circuit High Circuit Short to Battery [10/2022 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
for AWD models
| *1 | Vacuum Switching Valve (for Active Control Engine Mount System) | *2 | Front Engine Mounting Insulator |
| *3 | Rear Engine Mounting Insulator | - | - |
for 2WD models
| *1 | Vacuum Switching Valve (for Active Control Engine Mount System) | *2 | Front Engine Mounting Insulator |
| *3 | Rear Engine Mounting Insulator | - | - |
The active control engine mount system decreases engine vibration at a low engine speed using the vacuum switching valve (for active control engine mount system). The vacuum switching valve (for active control engine mount system) is controlled by a pulse signal transmitted to the vacuum switching valve (for active control engine mount system) from the ECM. The frequency of this pulse signal is matched to the engine speed to decrease engine vibration.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|
| P0A14-12 | Engine Mount "A" Control Circuit High Circuit Short to Battery | Short in vacuum switching valve (for active control engine mount system) circuit and power supply circuit (2 trip detection logic). |
|
Does not come on | Engine | A |
|