PO353 Code in 2006 Corolla LE

#1
CEL came on today on my way back home from Thanksgiving travel. Drove 225 miles with it on as there seemed to be no other bad indications or performance impact. Got home and used my code reader and found its PO353 - "Ignition Coil C Primary/Secondary Circuit Malfunction."

Any thoughts on how to tackle this?

Car is a 2006 Corolla LE with 1ZZ-FE engine.

Thanks in advance...
 
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