@reunion try to reset the ECU:
* Turn the ignition key to position “ON” without starting the engine and wait 3 seconds.
* Fully press and release the accelerator pedal five times within 5 seconds.
* Wait 7 seconds
* Fully depress the accelerator pedal all the way to the floor and hold for ten seconds. until the CEL starts blinking.
** ''At this point the light CEL should start flashing error code stored in the system and you can release the pedal. If you only get five flashes slowly or not flashing at all, then it is time You went on one of the above steps and you have to start from scratch.''
* Fully release the accelerator pedal (while the CEL is still blinking) and wait about 10 second.
* Fully depress the accelerator pedal and keep it for more than 10 seconds.
* Fully release the accelerator pedal (The CEL light will continue to blink).
* Turn the ignition off and start the engine to verify the indicator has been reset.
* What concerns me is the puff of smoke. Have you check the area where you seen it come up to identify any parts etc.? If unsure post plenty of picture about location etc. so that we can see what you see. [guide|21499]