20 Most Recent 2004 Honda Odyssey - Page 8 Questions & Answers

I would start with the rear blower motor resistor, the resistor is what controls the speed of the fan, the resistor is located in the rear heater box near the blower, you will need to remove the right rear side panel to access the heater box. start with that

There is a fuse or relay for it

there is no sight glass on the newer cars you have to hook up a/c gauge to check charge

The alarm should use the same relay, so it would have to be in the wiring between the steering wheel and the relay, or the horn pad you checked.

not a good situation! could blow your engine!! take it to a qualified honda dealer, and have them run code check on it- may be 'tps'- throttle position sensor. the code read may cost more than the fix! however, 8k rpms aren't healthy for your engine- so, check and fix may be cheaper than replacing engine! could also be your fuel vapor recovery canister is 'over -loaded', but unlikely!
good luck!

try this?remove --batery for 15 min reconect wait 15 min and start. notes only the negative cable.