What is the cost to fix this,,,,,,,,,,,,,,,, P0406 – Exhaust Gas Recirculation Sensor A Circuit High

 

I know it's an old post, but I have same error code problem. ( P0406)
after reading every thing it looks like I need to go to the dealer and have them:
" involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software."
Is this right? I can't just clean the thing? Or replace it?

'04 Ram Quad w/5.7

 

Bump as I have the same question as above.

 

Did any of you ever find out what the issue was and how much it cost to fix?
Thank you!