Check Engine Light On, Engine Runs OK on Kia Spectra5

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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Average mileage: 73,000 (40,000–105,000)
4 model years affected: 2005, 2006, 2007, 2008
9 people reported this problem
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problem details
2007 Kia Spectra5 40,000 mi,
code po449 comes up on tester check engine light on
2006 Kia Spectra5 84,000 mi,
Check engine light comes on when the engine runs fine.
2006 Kia Spectra5 105,000 mi,
Check engine light comes on sporadically, I fixed it by ignoring it.
My engine revs when I push in the clutch and engine light is on