2020 Toyota Camry: adaptive cruise control problems

Filed Aug 30, 2026 · Driver assistance · AZ

Camera / Radar component - yes Camera / Radar unit is available When it failed, the dash lit up with lots of errors: engine check light, anti-skid failure light (even though the system was turned off), rotating errors included: secondary brake system malfunction, pre-collission system malfunction, LDA system malfunction, check engine. I was driving up a 6% hill on a four lane road at 65 MPH with the cruise control active. Was in the left lane passing two slower trucks when the engine just seem to die and the dash lit up with lots of errors. By the time I was able to get to the right lane and off the freeway, I was doing less than 20 MPH. It turns out that when the radar / camera unit failed, the computer put copious confusing errors and put the engine in limp mode. Very dangerous and I'm lucky there wasn't more traffic. When the computer detected the failure should have automatically disabled the cruise control and put out an error message saying it was now disabled. The other junk errors just confused everything. The computer definitely should not have put the engine in limp mode. It was only after I pulled over and had time to digest the errors that I actually figured out what had happened and how to handle the situation. After I pulled off, the center display which had been saying there was a message that would display after I was safely stopped, now had an message indicating I should turn off the cruise control. Problem was I could not determine if the cruise control was active or not because the indicator was blocked by errors, however the engine was still definitely in limp mode. I finally turned the engine off and back on to make sure the cruise control was off. All the rotating errors and error lights were still on, but the engine was now out of limp mode and the car was again drivable.

Filed Jan 15, 2025 · FL

So a few months after installing the pedal commander chip my Camry out of nowhere began flashing warning symbols and messages and the engine was reduced to about 5% power. Pre-collision braking was down, ABS was down, lane assistance was down, cruise control was down and it also said “Engine Reduced Power”, please see dealership! So I parked, turned off the car and disconnected the battery for about 10-15 mins. When I reconnected the battery and started the car everything was fine and there were no codes/warning lights. So I thought it was a glitch. Then like 3-4 days later it did it again immobilizing me outside of a clients house to where I had to get it towed. I then thought to unplug the chip and see if that did anything and of course once I did it started up and drove fine with no codes, for about a month or so. Then it gave me all the same codes as before but now without the chip installed. Did an oil change with new filter, replaced the starter cause now it wouldn’t start at all or turn over. Once I replaced the starter, I was able to get it started and drive it a few times over the course of 3-4 weeks at the time I wasn’t driving it that much. But then all of a sudden it stops starting again and now gives me all those codes again and now my Camry has been immobilized for the past year, basically all cause of the accelerator chip.

Filed Jun 18, 2024 · Driver assistance · FL

Front camera disabled or front collision warning system disabled, not able to turn on cruise control. This have benn happening after this past very hot days, after blowing cold air to windshield it comes back to normal.

Filed Jan 22, 2023 · Driver assistance · HI

Several times when I was driving without cruise control down the hill from our home, the car's automatic brake turned on when I passed another car. The car incorrectly sensed that I was going to hit or be hit by the passing car and the automatic emergency brake turned on. Nothing happened except I was startled and puzzled. I was driving less than 30 mph on a residential street.

Filed Jul 13, 2022 · Driver assistance, Engine · CA

I have owned 5 Toyotas and a Lexus SUV and never had so many problems. This is a 2020 Camry Hybrid with only 20492 miles on it. It has had to be jump-started 3-4 times so far, but now it has a new issue: While on a road trip with my wife thru Utah, the car suddenly shuts down, bells ringing and messages appearing. Cruise control, Lane departure, and Headlight System Failure. This happened on a 2-lane highway with very minimal shoulder. I pulled over as far as I could, but still slightly in the lane. Turned off the ignition and after a minute or so, was able to restart the car. Noted that the sign on the road said "Next Services 129 Miles"! This was on July 11, 2022 at about 3 PM. Once car was restarted, we drove to our destination without further issues, however I would not use Cruise control for fear it would happen again. Got back to California the next day and took it to dealer to investigate the cause. Their conclusion: "Extreme heat caused the warning lights to come on, but history code indicates that the issue resolved itself. The vehicle is operating normally at this time but the system will be affected by high temperatures and direct sunlight"!!! The temperature on the road at the time was 95 degrees. Dealer contacted Toyota's technical assistance hot line to document concern Case #221930394. Per the service department, they called the field rep who said if everything was functioning at this time, then there was no action to be taken. First of all, I am 75 years old and do not expect this from a car with only 20492 miles on it, and especially not from a Toyota. I find the "solution" to be completely foolish - avoid high temperatures and direct sunlight!! Temperatures over 95 degrees and direct sunlight are common in many states. Can someone please get to the bottom of this? I am beginning to think that I bought a lemon. I am also reporting it to the federal safety agency, as it is a safety issue that must be dealt with. Thank you,

Filed Feb 5, 2022 · Acceleration, Driver assistance · NY

It's a dangerous thing. The first time it happened to me was on Jun 15, 2021, only the light came on and when I turned off the car the light went off after a month it came on again and turned off by itself, and now it turned on and it doesn't turn off for nothing. and it only says the PRE-COLLISION SYSTEM & CRUISE CONTROL MALFUNCTION alert. I was doing a little research online and I realized that many people have this problem regardless of the vehicle miles and this is dangerous since this happens on local streets or highways regardless of the speed of the vehicle. please investigate. Thank you.

Filed Oct 5, 2021 · Fuel system · WV

While driving vehicle, all of a sudden, the vehicle will slow down, lose power, even while using cruise control set to a specific speed. It will hesitate and driver, will feel car, slow and jolt forward.this occurs all the time while driving, especially if vehicle is warmed up.