Some 2012-2013 Ford Flex, Mustang, Taurus and Edge vehicles equipped with a 3.5L twin-independent variable cam timing (TIVCT) or 3.7L engine and built on Jan. 3, 2012,through July 31, 2012, may exhibit a MIL on with DTC P1450.
Mazda notes that on all models with IDS version 104 and higher, permanent DTCs are displayed. The purpose of a permanent DTC is to prevent customers from clearing them by disconnecting the battery cable in order to pass a smog check.
Troubleshooting Acura DTCs for a solenoid or motor power supply circuit failure? Keep in mind that even though the control unit activates these components, the power supply may come from a dedicated circuit and its own separate fuse.