Code 21 on nytro?

Trentikles

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Read code 21 at end of last year. Thought it was heated grips so replaced them and they heated up real nice. Now for the first ride of the year, no grip heaters at all and code 21 is flashing again.
Is there a fuse or something that I should be checking? any input would be appreciated.
 
Code 21 is the coolant temperature sensor. Had this come up on a buddy's vector when we had unplugged the lead during some work and forgotten to reconnect it. Handwarmers are Code 81.

Hape that helps! ;)!
 


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