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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (11 Of 14) >> SFI System >> DTC P16B4-79: Multi Flow Control Valve Stopper Mechanical Linkage Failure [12/2017 - ] >> Description

DTC P16B4-79: Multi Flow Control Valve Stopper Mechanical Linkage Failure [12/2017 - ]: Description

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.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory 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 engine switch off
  • Ball valve of water control valve operates beyond the lower limit stopper during forced operation immediately after engine switch off
Water control valve Comes on DTC stored SAE: P16B4