After starting the vehicle in sub freezing temperatures the brakes would not work. After applying extreme pressure it was found that the brake would operate but without any power assist. The error "er bb" was displayed on the instrument panel. After applying the brakes several times, the power assist started working and braking …
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After starting the vehicle in sub freezing temperatures the brakes would not work. After applying extreme pressure it was found that the brake would operate but without any power assist. The error "er bb" was displayed on the instrument panel. After applying the brakes several times, the power assist started working and braking was normal again. This condition has repeated several times after the vehicle sits in sub freezing temperatures for a period of time. I believe this may be caused by a frozen check valve in the vacuum line to the brake booster.
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