2020 Toyota Camry: false forward collision warnings

Filed Feb 9, 2026 · Brakes, Electrical · TX

While driving the car just shut-off in the middle of the road. If you tried to restart the car it would turn on rev the engine and shut off. The dash display displayed a message " precollision system malfunction" and "secondary brake collision malfunction". Safety wise if this had happened on the highway could have been very dangerous or worse. The car was inoperable and required a tow truck. Luckily we were not on a very busy road during the incident. The problem has been replicated and is currently being tested at Joe Meyers Toyota in Houston, Texas. When the message displayed on the dash, check engine light came on as well as the brake light on the dash.

Filed Oct 14, 2025 · Brakes, Driver assistance · 70,599 miles · TX

The contact owns a 2020 Toyota Camry. The contact stated that while driving 40 MPH, the vehicle lost motive power, with the engine, Forward Collision Avoidance, and brake malfunction warning lights illuminated. The vehicle was towed to the dealer, where it was diagnosed and determined that the ECM had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 70,599. The VIN was not available.

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 6, 2024 · Brakes, Engine · AR

ECM, FUEL Filter, fuel pump issues Reduced engine power Lane departure alert system suspended Pre-collision system Secondary collision brake system Vehicle stability control system Check engine - malfunction in electronic control engine, throttle or automatic transmission

Filed Sep 15, 2023 · Electrical · 74,480 miles · FL

The contact owns a 2020 Toyota Camry. The contact stated that while starting the vehicle, the front end of the vehicle made abnormal exploding sounds and there was smoke coming from under the hood. The vehicle was towed to the dealer, where it was diagnosed that the battery had exploded, and the battery was replaced. The contact stated that while driving at an undisclosed speed, the message "Pre-collision Warning Malfunction” was intermittently displayed. Additionally, the contact stated that while driving on another occasion, the message "Maintenance Required" and messages indicating the Pre-collision, Anti-Lock and ABS malfunction, and to contact the nearest dealer were displayed. The contact also stated that an alarm persistently sounded. The vehicle was taken to the dealer, where it was determined that the failure was due to rodents damaging electrical wires. The vehicle was taken to an independent mechanic for a second opinion, and the mechanic determined that the failure was caused by the acidic residues that remained in the hood after the battery explosion. The vehicle was taken back to the dealer to be repaired. The vehicle was not yet repaired. The manufacturer was made aware of the failure, and a case was opened. The failure mileage was approximately 74,480.

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 Nov 17, 2020 · Electrical, Engine · 25,000 miles · WI

Would not start, 25,000 . Hybrid malfunction warning, ocs warming, pre-collision warning, brake system warning. Dealer claimed software update issue. Had to be towed, late to work urgent care/covid, uber to dealer to get loaner, upset. Friday it happened again and I had surgery scheduled. Hybrid malfunction warning pre-collision warning, do not drive, call dealer, tow truck tested battery and it was good. Lights, bells, stereo worked, held key fob to push start no. 40,000 car and dealer today said, oh, we put in a new battery? In a new car? And for it to not start due to software update???? I go 100 out of city with dogs, no cell and would have been stranded in a brand new car due to no notification of hey there are problems, your car wont start, software update? Anything? Second time 6 weeks later, missed my surgery appt!!!!!!!! Tow it again, they now say that toyota has fixed on 2021 and dealer had list of vehicles with issues by VIN. Great. Why not tell me. One more lemon law wisconsin. I don't even want to go pick it up. Its going to happen again. I think it is electrical, starter, hybrid. Byw why not replace hybrid battery? Because they are too expensive. There are recalls for 2020 complete engines. I want it gone. It was parked in my driveway would not start at critical times. I do not feel safe in it, brake malfunction warning? Pre crash warning, hybrid?