I just finished replacing my timing belt ,thermostat , water pump, serpentine belt and cam & crank seals the motor runs good, but now I have a warning light on dash that is lit and it wasn't before I did all the work. it is the warning and indicator light . the warning light is a triangle with a circle around it and its yellow any ideas as of why it might b on I used a crank lock pin and the cam lock bar so I'm sure the motor is in time please help

 

Thw triangle with the circle around it is a traction control warning light. But, you didn't forget to plug if the MAF Sensor did you? The engine will run just fine without it using the O2 sensors but it will trip those lights if there is an issue with the MAF.