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2004 kia sedona
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I remember reading somewhere that the pcm is under the floor on the passenger side. Pull back the carpet starting at under the dash.
 

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2004 Optima 2.4 EX, 2005 Yamaha R1 (street) 2001 GSXR 1000 (track)
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1,018 Posts
I agree with Vino72. Once the carpet is pulled back the PCM is under a metal bracket. You'll need a deep 10mm socket to get it out of the way.
 
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