cold weather here in MN ( 10 below F).. Nissan Maxima SE, auto.
backed out of garage, stepped on brake (was very hard like no power assist) and kept on rolling. let car warm up for 5 minutes, brake pedal pressure was normal and car stopped ok.
drove 20 miles, parked car outside for 4 hours and when starting car, had same problem as above where brake pedal pressure was very hard with hardly any braking ability at first. And had to let car warm up.
then, was driving on freeway for 15 minutes and applied brakes, no power assist again. slowed down, pulled over, waited about 5 minutes and brake pedal returned to normal?
Anyone else seen this?
Suggestions?