This is a common problem usually related to the crankshaft position sensor. Before you replace it, disconnect the electrical connector to the CPS sensor and clean it with electrical contact spray and add a dab of dielectrical grease. If the problem continues, replace the CPS sensor. It is easy to replace and is not very expensive. It just bolts to the engine block with one or two bolts. I believe the CPS sensor on the Sedona is behind the timing cover on the front of the engine.
It isn't the CPS sensor trust me. We installed a new one at our shop since nobody knew what an IFS sen sor is and the vehicle runs fine with no tach. Either dont worry about it or go to KIA and spend $120 to get it figured out correctly instead of guessing online to save a buck. The CPS sensor cost $200 if you can even find it, and doesnt make a difference, Good Luck
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Thanks lylerwh, I didn't think anyone was going to answer. The van drives perfect. The only thing wrong is a check engine light and the Tachometer stuck on 0. I ran the scan tool at Schucks Auto and it came up with the p0320 code which is supposed to be a crankshaft sensor, but the kiatechinfo.com website says its a Ignition System Failure Sensor, which no one has ever heard of.
A crankshaft sensor is a part of the iginition system. If you don't have it, your plugs won't ignite. These terms are sometimes confusing.
Cessna1466u, did replacing the crankshaft sensor work? I am having the same problem.
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