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Highlander Limited, FWD
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Repair and Diagnosis
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Section 19 (Automatic Transmission (U660F) - Diagnostic Codes & Circuit Tests)
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Automatic Transaxle System
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DTC P0989: Transmission Fluid Pressure Sensor / Switch "E" Circuit Low; DTC P0990: Transmission Fluid Pressure Sensor / Switch "E" Circuit High [12/2013 - 11/2016]
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Typical Malfunction Thresholds
Typical Malfunction Thresholds
WARNING:
This page is about a different car, the 2016 Toyota Highlander, 2015 Toyota Highlander, and 2014 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
P0989:
Transmission fluid pressure switch No. 3
OFF
P0990:
Following conditions are met
(a) and (b)
(a) Engine speed - Turbine speed
35 rpm or more
(b) Transmission fluid pressure switch No. 3
ON