DTC P0666-00: Ecu Internal Temperature Sensor Circuit Malfunction: Notes

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DTC P0666:00 DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0666:00	ECU internal temperature sensor circuit malfunction
DETECTION CONDITION	Under the following condition, there is malfunction in circuit of ECU internal temperature sensor: Battery voltage is 8 V or more.
FAIL-SAFE FUNCTION	Inhibits learning control. Inhibits neutral idle control.
POSSIBLE CAUSE	Control valve body malfunction ECU internal temperature sensor (built-into TCM) malfunction
SYSTEM WIRING DIAGRAM	Not applicable