P0607 ECU Internal Performance , the computer has failed.
Trouble code P0606 means: Control Module Internal Performance Trouble code P0607 means: Control Module Performance
P0725 Engine Speed Input Circuit Error.
Trouble code P1281 means: Engine is cold too long
Trouble code P1391 means: Intermittent loss of CMP or CKP
Try disconnecting the battery for 1 minute.
Trouble code P0403 means: Exhaust Gas Recirculation Control Circuit
I use a scan tool after repairing the cause of the code.
Change in MAP sensor reading beyond limits.
P1491 Rad Fan Control Relay Circuit
Trouble code P0845 means:Transmission fluid pressure sensor/switch "B" circuit
Trouble code P0441 means:Evaporative emission control system incorrect purge flow
That is the check engine light. The engine computer has detected a malfunction and set a trouble code.