MY HYUNDAI LANTRA WILL NOT PASS THE EMISSIONS TEST,THE CAM CHAIN SEEMS RATHER LOOSE AND RATTLES, WILL THE FACT THAT THE CHAIN IS LOOSE ALTER THE TIMING ENOUGH TO EFFECT THE EMISSIONS

no info generic answer depending on vehicle p1773 has different meanings C2116 is an abs fault your test sheet will show reason for failure A I M is safety also look at sheet and or notify them as to reason your unknown vehicle failed

All this means is that your car will not pass an OBD 2 emissions test.
P-powertrain
1-MFG: manufacturer specific
5- vehicle speed control and idle control system
07- Hyundai 07 fault code.

www.ask.com/mfg.name/make/model/error/code/431/mean/

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.

change the catalytic convertor,, any mechanic can do this for you.

You need to have your check engine light checked to see what the code errors are and repair the problem so that it will pass smog. The check engine light is on telling you that something is wrong with the vehicle.

If the check engine light is on find out what code is comming up on the scanner....

I researched your problem and couldn't find any Service Bulletins or Recalls or Campaigns related to it. It seems, you'll have to take it into a Hyundai Service Center and pay the diagnostic fee to find out what's wrong. They'll give you an estimate of repairs (parts, labor, tax, time-frame, etc.) You can decide what you want to do then.
By the way, the symptom you describe could be fuel, electrical or both.

you will find two bright links on the chain that correspond to the dots on the cam shaft and the key ways on both cams should line up with the top of the head facing back towards the firewall IE parallel with the top surface of the head ( where the tappet cover bolts on), with the crank on TDC (top dead center)

If you are refering to the timing belt/ chain sprokets. Make your own marks with white paint. Also before removing the belt or chain use plastic cable ties to secure any pulleys/ sprockets so they cannot move. I used this method when replacing the timing belt on a vauxhall calibra v6 24v.