DTC P0748: Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1) [09/2014 - 11/2017]: Description

WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.

Shifting from 1st to 6th gear is performed in combination with "ON" and "OFF" operation of the shift solenoid valves SL1, SL2, S1, S2, S3, S4 and SR which is controlled by the ECM. If an open or short circuit occurs in any of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valve to allow the gears to be shifted smoothly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0748	Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1)	1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other While shifting between 4th and 5th gear. An open or short in the shift solenoid valve SL1 circuit is detected. 1 second 1-trip detection logic	Open or short in shift solenoid valve SL1 circuit Shift solenoid valve SL1 ECM	Comes on	DTC stored