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Q: Brake pedal force excessive after initial start up after car has been off for a while on 2005 Honda Accord Hybrid

First: The car has been off for several hours. Next: Get in and start the car. Put in gear and start on your way. Problem is noticed when you need to stop. The force required to get the brakes to function is equivalent to having no power assist at all. Pumping the brakes several times will bring the pedal force back up to normal if it's not too cold outside. If it is cold the power assist doesn't work for up to 45 seconds when outside temp is below 32 degress F. This started happening this winter so I thought that there must be moisture freezing somewhere in the brake system. But it's been doing it briefly when the outside air temp is as warm as 60 degrees F. Any ideas? Thanks! Neil
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The Hybrid Accord should be using electronics to retard vehicle speed, and should provide a proper pedal feel at all times.

It is possible that there is a vacuum issue, as you still do have assisted power brakes, but you need them less often with the hybrid functionality.

This concern is beyond the scope of what we can really successfully help you with in this forum -- I highly recommend a qualified technician with Honda Hybrid skills take a look at your car ASAP and ensure you do not have immediate safety issues. Good luck!
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