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Technical Service Bulletin No. KT2010052403

Combined TSB / Service Action: ECM Upgrade for P0304 Due To VCM Motor Variation (SA 038) (ENG 070R)
This bulletin provides the procedure to upgrade the Powertrain Control Module (PCM) of some 2010 Model Year Forte (TD) Sedan and Koup with 2.0L engines manufactured between 3/5/09~3/17/10. This reflash has enhanced VCM logic to improve a rough idle condition at start-up or a MIL ON and stored DTC P0304 set at start-up. To improve customer satisfaction Kia is requesting the completion of this Service Action on all affected 2010 Forte / Koup w/2.0L Engine vehicles.

For confirmation that the latest reflash has been performed to a vehicle you are working on, verify ROM ID using the tables in this TSB.

For vehicles not on the Affected Vehicles List, but with a customer concern, perform the following procedure outlined in this bulletin and submit a warranty claim per “customer concern” (Standard TSB) claim information on page 6.

For more info go to and register.
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