DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 110 (Hybrid Control System (2WD) - Diagnostic Codes (5 Of 7)) >> HYBRID CONTROL SYSTEM (for 2WD) >> DTC P1C77-79: Engine Failed to Start Mechanical Linkage Failure [12/2019 - 11/2023] >> DTC Summary

DTC Summary

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  1. MALFUNCTION DESCRIPTION 

    This DTC is stored when the hybrid vehicle control ECU determines that the hybrid vehicle transaxle assembly has seized or that there is a hybrid vehicle transaxle assembly malfunction in the drivetrain. The cause of this malfunction may be one of the following:

    Engine malfunction 

    • Seizure due to insufficient engine oil
    • Seizure due to insufficient coolant
    • Damaged engine

    Hybrid transaxle malfunction 

    • Seizure due to insufficient ATF
    • Damaged hybrid vehicle transaxle internal components
    • Damaged transmission input damper assembly