The Check Engine Light may erroneously illuminate, signifying a fault with the front oxygen sensor when no fault exists. Replacing the electrical connections at the oxygen sensor with a repair kit available from Kia will commonly fix this problem.Google+
Car Problem Reports
Kia Spectra Oxygen Sensor Code Due to Failed Electrical Connections at Sensor
Kia Spectra Problem
Average Mileage: 76,861 mi (32,000 mi - 130,000 mi)
Visitor, 2005 Kia Spectra, 55,000 mi
I bought this used at 55,000. Check engine light goes on and off. Sometimes days with no light. Other days it stays on maybe for a day.
Visitor, 2003 Kia Spectra, 80,100 mi
2003 Kia Rio....has now had the front O2 Sensor changed 4 times (Bosch brand versus manufacturer original part) and the back O2 Sensor once. It checks out fine then within days, always while driving on the highway, it indicates again. it is NOT fixed and I need advice
Visitor, 2006 Kia Spectra, 75,000 mi
I paid to have it turned off and it came back on the next day.
Dealer replaced electric connections twice prior to warranty experation. Light comes back on every 5 to 7500 miles. It's on at 74000 and I may have to change the oxygen sensor.
Visitor, 2005 Kia Spectra, 89,070 mi
Intermittant eng. check light for about a month. Dealer diagnosed it as the O2 connector and replaced it ($235!!!)