2005 Kia Sorento 6 cyl Four Wheel Drive Automatic 100000 miles
When it is very cold, below 10 degrees, I cannot push my brake pedal down to get the car out of park. As the car warms up the pedal works better. Braking improves but is still weak until the engine compartment fully warms up.
Big O says I need a new " sensor" for $500. KIA says they must actually " see" the problem to diagnose it. Local mechanic talked to a brake expert who said to run a can of super expensive fuel system cleaner through the engine to clear the vacuum line to the brakes.
Master cylinder was replaced a few months ago after total failure of hydraulic brake system. Brake system has been bled twice since to attempt to fix problem. Brake expert said to replace a particular O ring in the master cylinder if the engine cleaner doesn't work. He said it was probably not the vacuum booster.
I need a fourth opinion.
Saturday, February 20th, 2010 AT 9:22 AM