I have an 05 Santa Fe that is running good but is due for a "smog check" (CA) and I have an engine light that doesn't allow it to pass. My code checker says "P0320-crankshaft/engine speed (rpm) sensor circuit". My manual doesn't refer to an rpm sensor, just a crankshaft and camshaft sensor. I'm assuming one of these is the culprit, so can anyone tell me how to check it? Also, my tach doesn't work.