TPS low voltage (code p0122)

my check engine light came on, dealer reset but found no problems. every now and then when i turn on the car my tach needle will go up and down continuosly during idle. when i turn the car off and restart everything works fine. anyone experience this?

04 civic cpe. 36000 miles

I don't know, sounds like it might need a new throttle body. I would recommend a second opinion.

IMO You should contact Honda. They should cover it for you.