Check engine light: It indicates that there is a failure in the way the engine works, specifically in the exhaust system. When it blinks, the failure is serious.
Warning light that warns about problems encountered in the ECU of the car. It monitors the fuel system, the ignition system and the gases emission. The light may blink or remain on depending on the gravity of the issue.
Used the DBALL 2 interface and T-Harness for this vehicle. No wiring was required, remote started the car with original key (pressing lock 3x's). Car started remotely but caused check engine light to come on. OBDII code U1504.