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.
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Newest reported 2004 Kia Spectra problems
The original alternator was incapable of supplying sufficient power to the battery when the engine was idling with electrical loads (lights, air conditioning). A new, more powerful alternator and reprogramming of the powertrain computer will commonly correct this problem.