2016 Chevrolet Spark EV: jerking or lurching

Filed Jan 23, 2017 · Brakes · 1,773 miles · CA

4 times while driving, 1 time while stationary, the car's brake assist (power braking system) has gone out. Each time, it was difficult to slow the vehicle and bring it to a stop. There was a "service stabilitrak" warning followed immediately by a "service brake assist" warning. Concurrently, the ability to brake is extremely diminished. The brake pedal goes most of the way to the floor with very little braking capacity. It feels like there are no power brakes, only manual brakes that require a great deal of effort. Each of the first three times it went into the dealership, they told me they fully replaced the pedal assembly. As of the fourth time it went in (jan 13), where it still is now (jan 23), they were still unsure what the problem is or how to fix it. #1: oct 23, 2016 ~7:51pm light rain, ~50+ degrees, main boulevard but not during heavy traffic time, car in motion, estimated speed ~10-15mph #2: dec 9, 2016 ~7:51pm light rain, ~50+ degrees, main boulevard but not during heavy traffic time, car in motion, estimated speed ~10-15mph #3: dec 21, 2016 ~11:37am light sprinkling, ~50+ degrees, highway in heavy traffic, car in motion, estimated speed ~25-30mph #4: jan 12, 2016 ~2:50pm sunny after rain earlier in the day, ~60 degrees, main boulevard coming to stop at intersection to turn left at green light, car in motion, estimated speed ~5-10 MPH #5: jan 12, 2016 ~3:07pm sunny after rain earlier in the day, ~60 degrees, main boulevard. This is the most different, as the car was stationary. After maneuvering the car to the side of the road when the car malfunctioned, I turned the car off, then back on. The warning lights were off, and so I moved the car into drive with my foot on the brakes. At this point, the alarms turned on again, and the car lurched forward until I slammed on the brakes completely to the floor bringing the car to a stop.

Filed Jan 23, 2017 · Brakes · 2,613 miles · CA

4 times while driving, 1 time while stationary, the car's brake assist (power braking system) has gone out. Each time, it was difficult to slow the vehicle and bring it to a stop. There was a "service stabilitrac" warning followed immediately by a "service brake assist" warning. Concurrently, the ability to brake is extremely diminished. The brake pedal goes most of the way to the floor with very little braking capacity. It feels like there are no power brakes, only manual brakes that require a great deal of effort. Each of the first three times it went into the dealership, they told me they fully replaced the pedal assembly. As of the fourth time it went in (jan 13), where it still is now (jan 23), they were still unsure what the problem is or how to fix it. #1: oct 23, 2016 ~7:51pm light rain, ~50+ degrees, main boulevard but not during heavy traffic time, car in motion, estimated speed ~10-15mph #2: dec 9, 2016 ~7:51pm light rain, ~50+ degrees, main boulevard but not during heavy traffic time, car in motion, estimated speed ~10-15mph #3: dec 21, 2016 ~11:37am light sprinkling, ~50+ degrees, highway in heavy traffic, car in motion, estimated speed ~25-30mph #4: jan 12, 2016 ~2:50pm sunny after rain earlier in the day, ~60 degrees, main boulevard coming to stop at intersection to turn left at green light, car in motion, estimated speed ~5-10 MPH #5: jan 12, 2016 ~3:07pm sunny after rain earlier in the day, ~60 degrees, main boulevard. This is the most different, as the car was stationary. After maneuvering the car to the side of the road when the car malfunctioned, I turned the car off, then back on. The warning lights were off, and so I moved the car into drive with my foot on the brakes. At this point, the alarms turned on again, and the car lurched forward until I slammed on the brakes completely to the floor bringing the car to a stop.

Filed Jan 23, 2017 · Brakes · 2,741 miles · CA

4 times while driving, 1 time while stationary, the car's brake assist (power braking system) has gone out. Each time, it was difficult to slow the vehicle and bring it to a stop. There was a "service stabilitrak" warning followed immediately by a "service brake assist" warning. Concurrently, the ability to brake is extremely diminished. The brake pedal goes most of the way to the floor with very little braking capacity. It feels like there are no power brakes, only manual brakes that require a great deal of effort. Each of the first three times it went into the dealership, they told me they fully replaced the pedal assembly. As of the fourth time it went in (jan 13), where it still is now (jan 23), they were still unsure what the problem is or how to fix it. #1: oct 23, 2016 ~7:51pm light rain, ~50+ degrees, main boulevard but not during heavy traffic time, car in motion, estimated speed ~10-15mph #2: dec 9, 2016 ~7:51pm light rain, ~50+ degrees, main boulevard but not during heavy traffic time, car in motion, estimated speed ~10-15mph #3: dec 21, 2016 ~11:37am light sprinkling, ~50+ degrees, highway in heavy traffic, car in motion, estimated speed ~25-30mph #4: jan 12, 2016 ~2:50pm sunny after rain earlier in the day, ~60 degrees, main boulevard coming to stop at intersection to turn left at green light, car in motion, estimated speed ~5-10 MPH #5: jan 12, 2016 ~3:07pm sunny after rain earlier in the day, ~60 degrees, main boulevard. This is the most different, as the car was stationary. After maneuvering the car to the side of the road when the car malfunctioned, I turned the car off, then back on. The warning lights were off, and so I moved the car into drive with my foot on the brakes. At this point, the alarms turned on again, and the car lurched forward until I slammed on the brakes completely to the floor bringing the car to a stop.

Filed Jan 23, 2017 · Brakes · 3,006 miles · CA

4 times while driving, 1 time while stationary, the car's brake assist (power braking system) has gone out. Each time, it was difficult to slow the vehicle and bring it to a stop. There was a "service stabilitrac" warning followed immediately by a "service brake assist" warning. Concurrently, the ability to brake is extremely diminished. The brake pedal goes most of the way to the floor with very little braking capacity. It feels like there are no power brakes, only manual brakes that require a great deal of effort. Each of the first three times it went into the dealership, they told me they fully replaced the pedal assembly. As of the fourth time it went in (jan 13), where it still is now (jan 23), they were still unsure what the problem is or how to fix it. #1: oct 23, 2016 ~7:51pm light rain, ~50+ degrees, main boulevard but not during heavy traffic time, car in motion, estimated speed ~10-15mph #2: dec 9, 2016 ~7:51pm light rain, ~50+ degrees, main boulevard but not during heavy traffic time, car in motion, estimated speed ~10-15mph #3: dec 21, 2016 ~11:37am light sprinkling, ~50+ degrees, highway in heavy traffic, car in motion, estimated speed ~25-30mph #4: jan 12, 2016 ~2:50pm sunny after rain earlier in the day, ~60 degrees, main boulevard coming to stop at intersection to turn left at green light, car in motion, estimated speed ~5-10 MPH #5: jan 12, 2016 ~3:07pm sunny after rain earlier in the day, ~60 degrees, main boulevard. This is the most different, as the car was stationary. After maneuvering the car to the side of the road when the car malfunctioned, I turned the car off, then back on. The warning lights were off, and so I moved the car into drive with my foot on the brakes. At this point, the alarms turned on again, and the car lurched forward until I slammed on the brakes completely to the floor bringing the car to a stop.

Filed Jan 23, 2017 · Brakes · 3,006 miles · CA

4 times while driving, 1 time while stationary, the car's brake assist (power braking system) has gone out. Each time, it was difficult to slow the vehicle and bring it to a stop. There was a "service stabilitrak" warning followed immediately by a "service brake assist" warning. Concurrently, the ability to brake is extremely diminished. The brake pedal goes most of the way to the floor with very little braking capacity. It feels like there are no power brakes, only manual brakes that require a great deal of effort. Each of the first three times it went into the dealership, they told me they fully replaced the pedal assembly. As of the fourth time it went in (jan 13), where it still is now (jan 23), they were still unsure what the problem is or how to fix it. #1: oct 23, 2016 ~7:51pm light rain, ~50+ degrees, main boulevard but not during heavy traffic time, car in motion, estimated speed ~10-15mph #2: dec 9, 2016 ~7:51pm light rain, ~50+ degrees, main boulevard but not during heavy traffic time, car in motion, estimated speed ~10-15mph #3: dec 21, 2016 ~11:37am light sprinkling, ~50+ degrees, highway in heavy traffic, car in motion, estimated speed ~25-30mph #4: jan 12, 2016 ~2:50pm sunny after rain earlier in the day, ~60 degrees, main boulevard coming to stop at intersection to turn left at green light, car in motion, estimated speed ~5-10 MPH #5: jan 12, 2016 ~3:07pm sunny after rain earlier in the day, ~60 degrees, main boulevard. This is the most different, as the car was stationary. After maneuvering the car to the side of the road when the car malfunctioned, I turned the car off, then back on. The warning lights were off, and so I moved the car into drive with my foot on the brakes. At this point, the alarms turned on again, and the car lurched forward until I slammed on the brakes completely to the floor bringing the car to a stop.