2nd Method
NOTE:
The 2nd method should be performed only if the 1st method fails (the misfire-related codes recur).
- Start the engine and keep the engine running at idle for 2 minutes.
- Drive the vehicle for over 20 minutes, keeping the engine speed above 3500 rpm.
NOTE:
If equipped with manual transaxle, shift the gear properly for keeping the engine speed above 3500 rpm.
 Courtesy of KIA MOTORS AMERICA, INC.
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