Adaptive Cruise Control Problems of Chevrolet Volt

On 2 separate time periods, "propulsion power reduced" message appears on dash: - 1st incident in November 2022, car would not move after powering off the vehicle. After sitting idle for a week, decided to retry, and car seemed to work normally. Took it in to chevy service, they replaced the becm. Car worked fine after this - 2nd incident in November 2023, again 'propulsion power reduced' message appeared. This time, however, car would suddenly cut off gas engine (even at highway speed), switching to 100% battery mode, and displaying 'engine not available' on dashboard. Fuel level indicator would immediately display 'low' (even though gas tank was full). Reduced acceleration on battery mode. Car is now in same service center awaiting fix for the past month. Was quite an unsafe situation, especially at highway speeds, and especially given the fact that the battery also may have been at a low state of charge, risking complete vehicle breakdown. Coupled with both of these incidents, the cruise control intermittently shuts off, displaying 'cruise control unavailable'. Car is lightly utilized, with just over 30k miles on the odometer to date. Additionally, the car is kept in a mild climate (coastal southern California) and parked in a covered spot shielded from sun and temperature extremes.

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I was getting on the i15 freeway. After I entered, I set the cruise control and it immediately began to accelerate the vehicle to maximum speed. I was unable to turn it off and had to repeatedly push the brakes to keep the speed below 70 + mph. Smoke from the brakes began to fill the passenger compartment. I got off the freeway and when I slowed to about 20 mph, I heard a clunk under the dash and the cruise control turned off. I drove home the rest of the way without cruise control without incident. I am taking the car to a chevy dealer today to investigate the cause.

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The vehicle stopped on its own without obstacles. The vehicle fails to stop under adaptive cruse control and you have to disengage to stop or it will hit the car in front. When stepping on break during adaptive cruse it lurching forward before breaking takes over causing a hazzard. When you shif to park it doesn't register and will kill battery. Adaptive cruse does not keep it centered in clearly marked lanes.

Several times since I purchased the car in Jan 2022, the left and/or right front brakes have dragged without brake pedal actuation while I was driving in surface street traffic, typically with speed limits of 25 to 35 mph. This has resulted in overheating of the brake caliper, rotor, and wheel. Typically the car can be driven again without issue after two hours of cool-off time. This phenomenon has occurred during both battery/electric and gasoline engine operation of the plug-in hybrid car. There are no instrument indications of a brake malfunction when it happens. It first becomes perceptible as a pulsation through the steering wheel and requires increased throttle pedal pressure to maintain speed. I brought the car to my local Chevrolet dealer after the first two of these incidents. Their first recommendation was a new set of tires to remove the influence of one mismatched tire. The new tires did not resolve the issue, and the dealer has not performed any other corrective action beyond a recommendation to replace calipers and rotors. Due to the intermittent nature of the failure and the fact that it affects both of the front brakes, I believe this is an abs system issue and not a caliper/rotor issue, and I have not replaced those parts yet. The car's adaptive cruise control does not work properly. It almost always fails to set and shows "adaptive cruise temporarily unavailable" regardless of road conditions. This condition is intermittent and is not reproducible on demand. This condition is dangerous because it overheats the brake, wheel, and steering components. The heat may have damaged the wheel bearing, steering components, and cv joints. The heat also creates a risk of sudden wheel and/or tire failure while driving. The unexpected application of the brakes affects vehicle response to throttle and steering inputs, and has the potential to reduce driver control of the vehicle.

I'm having a shift to park issue with this chevy Volt, it won't register with the system I'm in park mode. I'm also having an adaptive cruise control issue as it's telling me adaptive cruise control is unavailable at this time. The adaptive cruise control is a hit or miss.

Shift to park warning on dash.