Just bought an 03 v6 ex coupe, and suspect transmission problems, its automatic, but changes gears slowly sometimes, and twice while in first gear I give it gas and it revs but doesnt go anywhere, almost as if the E brake is on. But when I turn the car off and restart it it doesnt do it anymore. My knock sensor is tripped but not sure if that has anything to do with it. Any Ideas? Help would be greatly appreciated.

 

If you have the code for the knock sensor (e.g., P0325), it may be due to rodent (e.g., rat) chew of the wire harnesses. Honda has an upgraded knock sensor harness with protective sheathing due to this very reason. It is common for rats to crawl in that warm space where your knock sensor is, on your generation Accord V6.

You might want to check out your wire harnesses.

The knock sensor or wiring may be the cause.

Easy for a rat; but, not easy for a you to get to the knock sensor though.

Knock sensor

 

So do you think the sensor is the cause or the trans?

 

It may be the knock sensor wiring harness. It can cause the knock sensor DTC (Diagnostic trouble code) P0325, a TCS (traction control system) DTC 31 (engine retard command), or both.

Read a little further down in this Honda Service News:

Honda Service News June 2004

I would begin with the knock sensor wiring, as you have a Check Engine Light and experiencing problems. Get the trouble code(s) read again to see if there are any other codes.