2019 Toyota RAV4: false forward collision warnings

Filed Aug 23, 2026 · Driver assistance, Fuel system · CO

While driving in the mountains on a hot day, the car suddenly reported numerous faults, including check engine, parking brake malfunction, pre-collision system malfunction, AWD system malfunction, and secondary collision brake system malfunction. The car lost power and forced us to pull over on the side of a dangerous mountain highway. We powered-off the car for a few minutes and started it again and were able to proceed to our nearby remote mountain destination without another loss of power, but the faults remained. The next day we were able to get the car to a nearby NAPA store to read the check engine codes, which there were only 2 of the "P0087" code. I had them clear the fault codes in order to be able to safely drive the car (~120 miles) back home. Some quick research shows a known issue and TSB for that in our exact high-altitude and high-temperature situation - Toyota T-SB-0058-22, related to a known design flaw with the ECM and fuel suction tube. Luckily, it did not throw the errors again during our drive home. I made an appointment at our local AutoNation Toyota Arapahoe for the following week. I detailed the issue and provided pictures of the errors - including the code reader display. The dealer claimed to not find any issues and refused to address/execute the TSB, stating that the code must be active and present in order for them to fix it and that my pictures were not sufficient proof. I explained that it was an unacceptable safety risk to have left the car in that state and that the issue is known to only occur in certain conditions (e.g. high-altitude, high-temperature mountain driving). Issue remains un-addressed, which is highly unacceptable and poses a serious on-going safety risk.

Filed Apr 29, 2025 · Driver assistance, Electrical · NV

While driving or stopped at a light, car will switch drivings modes to “mud and sand” turning off the vehicle stability control and pre-collision system warning light will illuminate. After pressing desired mode, car will switch back to “mud and sand” at varying intervals resulting in me pressing the desired mode constantly while driving.

Filed Mar 18, 2025 · Driver assistance, Engine · NY

My 2019 TOYOTA RAV4 ADVENTURE is groaning, especially when accelerating or decelerating, particularly with the AWD system engaged. Plus, there no or slow forward collision warning. Toyota seems to ignore these issues related to the Adventure RAv4 of 2019 and 2020. Thanks

Filed Mar 3, 2025 · Electrical, Engine · 87,230 miles · NJ

The contact owns a 2019 Toyota Rav4. The contact stated that upon starting the vehicle, the messages "Parking Brake Malfunction", "Secondary Brake system Malfunction”, “4WD Malfunction", "Lane Assist Malfunction", "Pre-collision Malfunction" and messages indicating malfunctions of the electrical system, the engine throttle, and the transmission were displayed. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, where a spark plug and ignition coil were replaced; however, the failure recurred. The vehicle was taken to the dealer, where the contact was informed that all the spark plugs and ignition coils needed to be replaced prior to the final diagnostic test. The vehicle was not completely diagnosed and was taken back to the mechanic, where a specialist used a camera to diagnose that there was coolant intrusion in cylinder #4, due to a fractured cylinder head. The mechanic related to the failure of the federal safety agency Campaign Number: 20V064000 (Engine and Engine Cooling); however, the VIN was not included. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was provided because the vehicle was not covered under warranty and the VIN was not included in the recall. The failure mileage was approximately 87,230.

Filed Nov 6, 2023 · Driver assistance · NJ · crash

Pre-Collision System (PCS) failed. My daughter during sunset (sun glare) struck the vehicle in front of her, that suddenly braked due to sun glare. Toyota hasn't look at PCS system yet and the car is at the repair shop, but I did open a case with Toyota to investigate failure and access onboard data. Auto repair shop will check the system, but no malfunction warning on the car's warning display. There were no warning present prior to accident or post-accident.

Filed Mar 14, 2023 · Body, Driver assistance · CA

A couple of months ago, I noticed water had somehow entered the inside of my car, collecting along the interior roof panel and inside the C-pillar close to the top of the driver door. I did a little research to see if I could figure out what the cause of it was. I found that many other owners of 2019 and 2020 Rav4's had similar problems. Their findings indicated that Toyota had equipped poor quality gaskets, along the the area in which the roof rail trim were fastened to the roof of the car. I also read that this problem could be fixed by the owner, but was unaware that the water leakage would come in contact with electrical components. Yesterday, I experienced first hand the result of this situation. When starting my car, the display board was indicating a multitude of warnings for system malfunctions. These included power steering malfunction, brake system malfunction, pre-collision warning malfunction, lane-monitoring, and on top of this the RPM gauge and engine temperature gauge were both malfunctioning. These warning/indicators persistently flashed and caused a loud beeping sound to go off. The warnings also informed me to not drive the car and see a dealer immediately. After taking it to the dealer, the technicians were able to confirm that water has leaked through the roof rail panels from the area I previously specified. They found water on fuse box/junction connectors. They also found corrosion on pins on driver front door connector, under dash harness connector and body harness connector. While the water damage did not lead to a car accident, it did cause serious concern for the potential risk of car malfunctions. This information will be soon be reviewed by my insurance provider.

Filed Dec 16, 2022 · Driver assistance, Electrical · VA

The vehicle enters mud/sand mode spontaneously, causing the ABS, traction control, and forward collision warning to turn off. I cannot enter mud/sand mode myself when pressing the button. Must turn on normal or eco mode to get out of mud/sand mode once it activates. It has happened over a dozen times in a week.

Filed Oct 21, 2022 · Brakes, Electrical · NJ

Brake System A malfunction in the Brake System has been detected. Continuing to drive may be dangerous. Stop in a safe location and contact your Toyota dealer to have your vehicle inspected. 10/20/2022 Pre-Collision System A malfunction in the Pre-Collision System has been detected. Do not rely on this system. Contact your Toyota dealer to have your vehicle inspected. 10/20/2022 Electronically Controlled Brake System A malfunction in the Electric Control Braking System has been detected. Contact your Toyota dealer to have your vehicle inspected. 10/20/2022 Anti-Lock Brake System A malfunction in the Anti-Lock Brake System or brake assist system has been detected. Contact your Toyota dealer to have your vehicle inspected. 10/20/2022 Drive-Start Control System A malfunction in the Drive Start Control System has been detected. Contact your Toyota dealer to have your vehicle inspected. 10/20/2022 Blind Spot Monitor A malfunction in the Blind Spot Monitor System has been detected. Do not rely on the system for lane changing. Contact your Toyota dealer to have your vehicle inspected. 10/20/2022 Vehicle Stability Control System A malfunction in the VSC, TRAC, or hill-start assist control system has been detected. Do not rely on these systems. Contact your Toyota dealer to have your vehicle inspected. 10/20/2022 Secondary Collision Brake System A malfunction in the Secondary Crash Mitigation Support Brake System has been detected. Contact your Toyota dealer to have your vehicle inspected. 10/20/2022

Filed Feb 6, 2020 · Engine, Fuel system · 200 miles · MN

Vehicle does not function as advertised, ECM appears to change shifting, hybrid, and gasoline usage at lower temps. Pre-collision system malfunctions with any visibility reduction, causing the vehicle to suddenly brake at highway speeds or to not brake at all with radar cruise active. Also have same issue as others with not being able to fill tank more than 10 gallons of 14. Mileage is as low as 24 mpg for a whole tank, driving very conservatively.

Filed Feb 2, 2020 · Brakes · 500 miles · MD

Toyota pre-collision system with pedestrian detection does not appear to work as advertised. The vehicle has been back to the dealership due to the pre-collision system not sending a warning as it should. Dealership stated that there would most like cause damage to my vehicle if they attempted to test the system; the the vehicle did not stop as it should, they would not be responsible for the damage they caused. I also contacted toyota directly how said they could not comment and I need to refer to the toyota documentation which I explained show the vehicle sending warnings and stopping well before my vehicle does. The dealership did confirm the sensitivity was turned all the way up, they could not explain why it was not working, but said "the car is smarter then people so don't worry about it"

Filed Sep 30, 2019 · Driver assistance · 57 miles · ID

Brand new vehicle had only been driven 20 miles away from the dealership, at low speed, in a parking lot, alarms began going off indicating numerous system malfunctions including; low brake power, antilock brake system malfunction, vehicle stability control system malfunction, secondary collision brake system malfunction, electronically controlled brake system malfunction, pre-collision system malfunction, ultrasonic detecting & ranging system malfunction.

Filed Aug 9, 2019 · 7,000 miles · CA

Precollision warning system is not working. Complained to dealer but no action done. Almost hit a couple times pedestrians. It looks like radar sensors ln front are not working. Front camera is working.