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Home >> Toyota >> 2017 >> Corolla L >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Continuously Variable Transaxle - Diagnostic Codes (1 Of 3) (Model Code: ZRE172) >> Continuously Variable Transaxle System >> DTC P0842, P0843; Transmission Fluid Pressure Sensor/Switch "A" Circuit Low [08/2013 - 08/2016] >> Description
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DTC P0842, P0843; Transmission Fluid Pressure Sensor/Switch "A" Circuit Low [08/2013 - 08/2016]: Description

The ECM performs learning control for the belt clamping pressure based on the belt clamping pressure signal, which is output by the oil pressure sensor.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0842 Transmission Fluid Pressure Sensor/Switch "A" Circuit Low
  1. Diagnosis Condition
    • 2 seconds or more after engine start
  2. Malfunction Status
    • Short in oil pressure sensor circuit
  3. Malfunction Time
    • 0.5 seconds
  4. Other
    • 1-trip detection logic
  • Wire harness or connector
  • Oil pressure sensor
  • ECM
 Comes on DTC stored
P0843 Transmission Fluid Pressure Sensor/Switch "A" Circuit High
  1. Diagnosis Condition
    • 2 seconds or more after engine start
  2. Malfunction Status
    • Open or short to B+ in oil pressure sensor circuit
  3. Malfunction Time
    • 0.5 seconds
  4. Other
    • 1-trip detection logic
  • Wire harness or connector
  • Oil pressure sensor
  • ECM
 Comes on DTC stored
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