DTC P0667-00: Ecu Internal Temperature Sensor/Performance Problem (TCM) (Us): Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0667:00 (TCM, ET6A-EL, ET6AX-EL, US) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	ECU internal temperature sensor/performance problem
Detection condition	Under the following conditions, the difference between ECU internal temperatures of three ECU internal temperature sensors are 15°C {59°F} or more: Engine is running. Soaked for 6 hours or more. No malfunction in ECU internal temperature sensor circuit
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