97 Caravan electronic instrument cluster

My electronic instruments (speedometer, tach, temp gauge, gas gauge, etc.) will suddenely go out. No tach, miliage display, spedometer, etc. The next time I drive it, it will be ok. It may go out and come back 10 min
later. Im showing a code 66-no ccm from tcm. Is this a common problem? Thank you for any help.
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