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

WARNING: This page is about a different variant/trim than selected.

DTC P0666:00 (TCM, ET6A-EL, ET6AX-EL, US) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	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	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
Connector diagram	Not applicable