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Home >> Toyota >> 2020 >> RAV4 LE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 139 (Hybrid Control System (Lithium-Ion Battery) - Diagnostic Codes (5 Of 6)) >> HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY) >> DTC P1C77-79: Engine Failed to Start Mechanical Linkage Failure [06/2020 - ] >> DTC Summary

DTC Summary

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  1. MALFUNCTION DESCRIPTION 

    This DTC is stored when the hybrid vehicle control ECU assembly determines that the hybrid transaxle assembly has seized or that there is a hybrid 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 transaxle internal components
    • Damaged transmission input damper assembly