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Home >> Lexus >> 2017 >> IS 300 F Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 105 (Automatic Transmission System (Aa80E) - Diagnostic Codes (2 Of 2) & Circuit Tests) >> Automatic Transmission System >> DTC P0872: Transmission Fluid Pressure Sensor / Switch "C" Circuit Low [11/2021 - ] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
  1. When both conditions below are met: OFF malfunction (A) and OFF malfunction (B), (C), (D), (E) or (F)

    2 detections are necessary per driving cycle:

    1st detection: temporary flag ON

    2nd detection: pending fault code ON

    OFF malfunction (A) 

    1. Oil pressure switch indication OFF

    OFF malfunction (B) 

    1. When either condition below is met: Condition (1) or (2)
      CONDITION (1)

      Turbine speed / Output speed (NT / NO) 3.9 or more and 8.0 or less
      (when output speed less than 130 rpm)
      CONDITION (2)

      Turbine speed - Output speed (NT - NO) x 1st gear ratio
      (Actual 1st gear)      		 -50 rpm or more and 50 rpm or less
      (when output speed 130 rpm or more)

    OFF malfunction (C) 

    1. When either condition below is met: Condition (1) or (2)
      CONDITION (1)

      Turbine speed / Output speed (NT / NO) 2.4 or more and 2.9 or less
      (when output speed less than 200 rpm)
      CONDITION (2)

      Turbine speed - Output speed (NT - NO) x 2nd gear ratio
      (Actual 2nd gear)      		 -50 rpm or more and 50 rpm or less
      (when output speed 200 rpm or more)

    OFF malfunction (D) 

    1. When either condition below is met: Condition (1) or (2)
      CONDITION (1)

      Turbine speed / Output speed (NT / NO) 1.72 or more and 2.07 or less
      (when output speed less than 400 rpm)
      CONDITION (2)

      Turbine speed - Output speed (NT - NO) x 3rd gear ratio
      (Actual 3rd gear)      		 -50 rpm or more and 50 rpm or less
      (when output speed 400 rpm or more)

    OFF malfunction (E) 

    1. When either condition below is met: Condition (1) or (2)
      CONDITION (1)

      Turbine speed / Output speed (NT / NO) 1.354 or more and 1.584 or less
      (when output speed less than 600 rpm)
      CONDITION (2)

      Turbine speed - Output speed (NT - NO) x 4th gear ratio
      (Actual 4th gear)      		 -50 rpm or more and 50 rpm or less
      (when output speed 600 rpm or more)

    OFF malfunction (F) 

    1. When either condition below is met: Condition (1) or (2)
      CONDITION (1)

      Turbine speed / Output speed (NT / NO) 1.141 or more and 1.291 or less
      (when output speed less than 600 rpm)
      CONDITION (2)

      Turbine speed - Output speed (NT - NO) x 5th gear ratio
      (Actual 5th gear)      		 -50 rpm or more and 50 rpm or less
      (when output speed 600 rpm or more)
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