2003 Kia Rio Check Engine Light

The abs light means your anti-lock brake system has detected a fault and probably isn't working. Your check engine light probably came on at the same time. Get a mechanic or someone with a car computer code reader to connect to the diagnostic port under the dash and read off the error codes to diagnose your problem better.

Mil stands for malfunction indicator light or lamp or CEL , check I engine light.... Hook up obd and pull codes.

Check the wiring, animals love chewing on wires.

I would guess a wiring issue. Check all the cabling and make sure all connectors are nice and snug with no signs of corrosion or burnt.

If it is indeed a 2004 Kia Rio, this is the answer. It is a communication signal protocol, not a code.

Year Make Model in all questions please.

https://www.kia-forums.com/threads/odb-code-iso-9141-2.169418/

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My 2003 Kia Rio has almost 200,000 miles on it... 4 months ago I drove it over 2,000 miles with no problems. Before leaving, I took it in to my mechanic to have them change the oil and oil filter, and just generally check it over... fluid levels, brakes, tires ~ basic stuff.
Good luck!

take to an auto store most such as auto zone / advanced auto offer the scan for free the code will narrow down where the problem is so u can repair the car

my 01 did that and it was the plug wires it bucked real bad
next time it happened it was just sluggish up hills and light would come on. it was the fuel filter it had 255,000 miles on it

there can still can be a problem some auto parts store can test the car with a computer for free and the you what it is. it can be a loose gas cap or a sensor. e.t.c

your post is 1 year old. i started helping others 1 week ago. as a fellow rio owner im here to help there are currentl over 5000 un answered posts. if you still need help re-post your problems .its free to get your check engine light checked at most auto parts stores . write down the codes and meanings. 03 kia rio's are blue booked at about $500.
if you re-post with a code you can get faster help. if your car dont have a code . its hunt and guess . my guess would be throtle position sensor,knock sensor or mass air flow