2000 Daewoo, check engine light is on. How to turn

Check out the videos. Also drop a bottle of Fuel System Cleaner to a quarter tank of gas.

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Depends on why the light was turned on. If it was a problem with an emissions component, the problem may still exist.

I have a 2013 dodge dart 1.4 liter rally have a po626 code on new alternator and battery I check the ground wires seams tight check my fuses i cant find anything and it won’t pass emissions test with the check engine light on

Most probably the system will not pass the emission test as it is related to air and fuel supply system. The problem relates high and low voltage supply to cam circuit. If high voltage is supplied the light will come on and you may not be able to pass the emission test.

Take it to autozone or another place like it and have them read the codes and tell us what they are.

What fault code is being set?

The check engine light comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test

catalytic converter is the way to fix your problem because they do an emissions test and the code want go away even if you get the light off before you take it in they will no the computer has just been reset so which means all the sensors want have enough info to give the computer because of being reset sorry to break it to you.

Some vehicles require very specific drive cycles (called "drive traces" if you perform them on a road simulator or dyno) to activate certain self-checks like the catalyst and EVAP monitors. As a general rule, doing some stop-and-go driving around town at speeds up to about 30 mph followed by five to seven minutes of steady 55 mph highway speed driving will usually set most or all of the monitors. Consequently, if you're checking an OBD II system and discover that one or more of the monitors have not run, it may be necessary to test drive the vehicle to set the remaining monitors.

You should talk to a good emission tec, if this is not throwing a code, it is hard to say if that one of the components could be bad. O2,pump,convert, HeO2, every part of the emission system.

With a 1000 miles, and doing what is says above just before the test, and ending driving at the test
should be plenty. If it is not, you will have to have each emission part checked, or when the computer
is plugged in it might show a code that did not trip dash light.

have you had the the engine codes pulled and reset?
and if so what are your engine codes?
i dont know of any car that will pass emissions test with the engine light on.
we cure your trouble that caused your engine light to come on and you will pass your test.
later
paul