DTC P1703-00: AT Solenoid Output Malfunction [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.

The ECM detects an erroneous downshift output to the automatic transmission or a gear shifting malfunction.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	DTC Output from	Priority	Note
P1703-00	AT Solenoid Output Malfunction	ECM internal malfunction (1-trip detection logic)	Wire harness or connector Transmission revolution sensor (NC) Transmission wire Solenoid (SL1) valve Solenoid (SL2) valve Solenoid (SL3) valve Solenoid (SL4) valve Solenoid (SL5) valve Solenoid (SL6) valve Solenoid (SL) valve Solenoid (SLU) valve ECM	Comes on	Transmission	A	SAE Code: P1703