LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 119 (Engine Control System - Diagnostic Codes (08 Of 10)) >> SFI SYSTEM (for Gasoline Model) >> DTC P16B4-79: Multi Flow Control Valve Stopper Mechanical Linkage Failure [10/2022 - ] >> Description

DTC P16B4-79: Multi Flow Control Valve Stopper Mechanical Linkage Failure [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 water control valve shaft is fixed to the center of the ball valve, and its role is to transmit the rotational drive torque transmitted from the internal DC motor via the gear to the ball valve.

GTY833145Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC No. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from Priority Note
P16B4-79 Multi Flow Control Valve Stopper Mechanical Linkage Failure Both of the following conditions are met for 0.5 seconds (2 trip detection logic):
  • Ball valve of water control valve operates beyond the upper limit stopper during forced operation immediately after ignition switch off
  • Ball valve of water control valve operates beyond the lower limit stopper during forced operation immediately after ignition switch off
Water control valve Comes on Engine B
  • SAE Code: P16B4
  • DTC for Mexico Models: Applies