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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (Engine Control System - Diagnostic Codes (02 Of 10)) >> SFI SYSTEM (for Gasoline Model) >> DTC P0125-00: Insufficient Coolant Temperature for Closed Loop Fuel Control [10/2022 - 08/2023] >> Description

DTC P0125-00: Insufficient Coolant Temperature for Closed Loop Fuel Control [10/2022 - 08/2023]: 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.

Refer to DTC P0115-11.

Refer to DESCRIPTION 

DTC No. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from Priority Note
P0125-00 Insufficient Coolant Temperature for Closed Loop Fuel Control The engine coolant temperature does not reach the closed loop enabling temperature for 20 minutes (this period varies with the engine coolant temperature at engine start) (2 trip detection logic).
  • Water control valve
  • Engine cooling system
  • Engine coolant temperature sensor (for cylinder head side)
  • Engine coolant temperature sensor (for outlet side)
Comes on Engine B
  • SAE Code: P0125
  • DTC for Mexico Models: Does not apply