O2 sensor codes say its bad but looks as if this could be a PCM update is needed

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Can you help me with a similar issue... My HCH 2005 rear sensors replaced by Honda 2 years ago and in the past month I got the same PO135 code for the rear sensors to be replaced, Honda verified the same and gripped with Honda not standing behind their product as the cost an arm and leg to be done by honda. Bought the Denso replacements and less than a month later, I am getting engine light on with the same replace sensor codes. Read this PCM option as a solution and a check under the hood for the . under the hood VIN J and it wasn't their. Is my HCH eligible for a PCM update? JHMES96695S000119 Any advice would help...