One problem related to brake abs warning light has been reported for the 2012 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Jeep Grand Cherokee based on all problems reported for the 2012 Grand Cherokee.
Driving the vehicle from the driveway doen the road to a stop sign. When applying the brakes noticed that the pedal went down to the floor and the brakes did not grab to stop the vehicle. Holding the pedal to the floor heard a sound (like air releasing from a basketball) and the vehicle slowly began to slow down and roll to a stop. Acrefully reached my destination which was a short distance. Left vehicle in parking lot and went to work. Came out approximately three hours later. Air temperature had warmed up to above 32 degrees. Drove vehicle again and brakes worked normally. Called dealership the next day and they said since no abs light came on they really couldn't do anything. They suggested that maybe there was air in the brake line. Well on Feb. 18th it happened again after the vehicle was outside in the cold and the wind chill was in the single digits. I called the dealership immediately and was told to bring it to them. I did and the service person when moving my vehicle to "around back" had the same occurance. Brake pedal going all the way to the floor and vehicle rolling to a stop. Well the mechanic didn't get to the vehicle until later in the day when the air temperature warmed up and he found that the brakes were functioning normally and he could not find any issue with the brake lines, brake master cyclinder, or abs. The dealer has kept the vehicle overnight but I am concerned they will find no issue. I do not want to drive the vehicle until I am assured that the brakes will function properly in all weather condions.