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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 22 (Automatic Transaxle) >> Automatic Transmission System >> DTC P0873: Transmission Fluid Pressure Sensor / Switch "C" Circuit High >> Description

DTC P0873: Transmission Fluid Pressure Sensor / Switch "C" Circuit High: Description

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

The oil pressure switch, which is built into the valve body, detects the fluid pressure of the SL1 fluid pressure circuit. If shift solenoid valve SL1 is stuck ON, P0873 is output

DTC DETECTION CONDITION AND TROUBLE AREA

DTC Code DTC Detection Condition
  1. Diagnosis Condition
  2. Malfunction Status
  3. Malfunction Time
  4. Other
 Trouble Area
P0873
  1. ECT is 40°C (104°F) or more, ATF temperature is -10°C (14°F) or more, and vehicle is driven with shift lever in D (no malfunctions are detected in shift solenoid valve SL1, 2, 3, 4 and 5, SR, speed sensors (NT, NC3, SP2), water temperature sensor, oil temperature sensor, knock control sensor, electronic throttle, or CAN2)
  2. When actual gear is 6th to 8th gear, oil pressure switch is ON
  3. Malfunction status occurs 2 times (1 trip)
  4. 2 trip detection logic
  • Shift solenoid valve SL1
  • Oil pressure switch
  • Transmission wire
  • Harness and connector
  • TCM
  • Valve body assembly
  • Automatic transmission assembly
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