Fuel cap was loose. Tightend cap indicator lamp still on.
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2008 Kia Optima Question: How to turn off malfunction indicatop lamp.
Answer #1Rojo1 October 13, 2013, 11:19Technician
It should clear if you remove the NEGATIVE cable from the battery for a few seconds however, if tightening the cap corrected the problem, the light should turn off after 3 drive cycles. (A basic drive cycle involves starting the car cold, i.e. after sitting over night, driven normally until reaching operating temperature, then turning the engine off). You said the cap was loose. Did you have a trouble code P0455 or P0456?
ReplyBWRIGHT21, October 13, 2013, 12:38Rookie
Yes, code number P0455 per AutoZone engine light check.
ReplyRojo1, October 13, 2013, 16:45Technician
Go back to AutoZone and have them erase the code and ask them to test your fuel cap. When you fill your tank make sure that the fuel cap clicks a minimum of 3 times as you tighten it. If the cap is good and you make sure the cap is tight, that should take care of it. If the code comes back, you may have a faulty vent valve on the evap system but that will usually throw an additional DTC.
ReplyBWRIGHT21, October 15, 2013, 14:22Rookie
PURCHASED AN OEM FUEL CAP, LIGHT WENT OFF THE SAME DAY. THANK YOU VERY MUCH FOR YOUR ASSISTANCE.