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

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 . Diagnostic support note The check engine light illuminates if the TCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the TCM. The automatic transaxle warning light illuminates if the TCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the TCM. PENDING CODE is available. FREEZE FRAME DATA is available. DTC is stored in the TCM memory.
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