HUMMING (weird noise)
 

Anyone else with an '05 HCH get this sound...

While driving or coasting downhill at approximately 60-75mph a very loud humming from the engine compartment? It lasts for a few seconds (only while going downhill) and then leaves.

The dealer says it is that way in all of the '05's that they have compared it to.

Re: HUMMING (weird noise)
 

You sure that's not the noise from the generator engaging to charge the battery? We've notice it but it's not a bad sounds assuming it's the generator.

Re: HUMMING (weird noise)
 

This noise is quite loud. If on the cell phone, the other person hears it. It sounds like a restricted A/C compressor (even if A/C is on or not).

Re: HUMMING (weird noise)
 

I would ask the dealer to let you try "another" hybrid to see if you hear it. I doubt that it is a "normal" sound. If your dealer says no, I'd take it to another dealer or call Honda zone office for help.

Our car "whines" when slowing down, but that's normal for the hybrid.

Re: HUMMING (weird noise)
 

I have a manual 05 hch and I get no humming on hills or at high speeds. i don't get a loud hum when I shut the car off, but I would assume that is the fan inside, normal for every car I've been in.