2019 Acura RDX: adaptive cruise control problems

Filed Nov 27, 2024 · Engine · CA

I started driving on the freeway for a few miles in the rain and suddenly started to hear a low rumble/rattling sound from the engine area. The car began to cycle through error messages for every one of the electronic safety systems (Brake system, vehicle stability assist system, electric power steering system, adaptive cruise control system, collision mitigation braking, & road departure mitigation) The car then began to lose drive power (wouldn’t maintain/increase speed when pressing the gas pedal). I moved over to the furthest right lane/slow lane and continued to lose propulsion from the gas pedal. Being forced to such a slow speed on the freeway in inclement weather was very unsafe for me and my wife who was in the car with me. I had to drive on the shoulder in order to exit the freeway and the engine rattle got increasingly louder and worse sounding. I pulled into a parking lot and the car was not drivable. AAA tow to a AAA certified mechanic repair shop and was told that there was metal debris in the oil pan and oil filter which was signs a faulty engine components that has now destroyed the motor. I’m currently without the RDX and being told it is in need of a whole new motor.

Filed May 18, 2024 · Driver assistance · CA

While driving today around 30 MPH using cruise control the display suddenly changed from showing a vehicle icon on the HUD and dashboard display to a black box with a white line around it with the words in white "Cruise Mode" and disabled my cruise control operation while I was driving. This action almost resulted in a rear end collision with the vehicle in front of me as I was barely able to stop the vehicle before hitting the rear of the car in front of me. There was no warning no message that the function was being disabled. It just suddenly happened. I have contacted multiple dealers on this, contacted Acura Emergency services and Roadside Assistance. No one has ever heard of this happening and have no idea of the cause. Acura Client Relations is closed on the weekends and has no hotline on the weekend for reporting safety issues. I can't even get any constructive feedback as to if the car is currently safe to drive without using the cruise control. I have scheduled an appointment with Acura of Fremont Service on Monday at 2:30PM PDT. This may be a flawed vehicle update that was pushed onto the vehicle while driving as I have run in car diagnostics and everything that should be normal in green seems to be. In my opinion this should be a high priority as it can lead to collisions.

Filed Nov 28, 2023 · Electrical, Engine · CT

Transmission intermittently gets stuck in a gear while driving and will not shift until car is powered off and on again. Brake system, LKA, power steering, vehicle stability/traction control, hill assist, cruise control, collision mitigation, and road departure mitigation intermittently stop working and error. Infotainment and audio intermittently error or get stuck on after powering off vehicle. Trunk randomly opens when no one is in range of the vehicle. Horn randomly sounds for approximately 30 seconds on hot days after vehicle is stopped. Engine cylinder heads, transmission, and horns have been replaced without resolution. MOST bus system has been replaced twice without resolution. All issues have been recorded on video and documented with the local Acura dealer and Acura Client Relations, but neither has been willing to help reach a resolution.

Filed Nov 3, 2020 · Acceleration, Driver assistance · 4,500 miles · IL

Lkas system is dangerous - will pull to the right then shift to left dramatically and then overshoot markers. Will take you off the road, car will not stay in the correct lane. Does not recognize double yellow lines and cuts right across them, sometimes unexpectedly. Pays no attention to them driving on a 8 lane highway, in the fast lane with cruise control on. I am passing a car/truck going slower in the next lane to my right. All of a sudden, the car just hits the brakes and sounds an alarm. Very dangerous, can be hit from behind due to sudden unexpected braking. My car was not close to the other vehicle only approaching it. I've had the same thing happen when I'm moving to an exit lane with the blinker on. When approaching an entrance onto the interstate, the car sees the guard rail as a hazard and again, brakes hard while flashing the warning light. E car, I have reported it to the service group but as always the problems occur randomly I've also had it happen with a loner, a 2020 model. When approaching an entrance onto the interstate, the car sees the guard rail as a hazard and again, brakes hard while flashing the warning light. Stupid! The turn signal is in use. These are vehicle hazards caused by the so called, enhanced safety features, but which, in fact, create a situation that is dangerous. If anyone else drives the car, I have to spend time educating them of the 'problems' they may encounter driving the car. I have reported it to the service group but as always the problems occur randomly and never when the car is in for service. I've also had it happen with a loner, a 2020 model.

Filed May 26, 2019 · Engine · 5,600 miles · TX

My acura has "stalled" twice now while passing (once at about 4800 miles and the other at about 5600 miles on odo). Both times the car was in cruise control and lane keep assist and traveling on a highway at about 60mph. Both times I was overtaking a large vehicle that was to the right of me. Both times, I put the pedal to the floor, the car accelerated for only a split second, then lost all power, the engine light started blinking and went into limp mode. I had to cut across several lanes of traffic with no engine power to get the shoulder. (very dangerous.) both times, when I shutdown and immediately restarted the car, it then ran normally. However, both times after this happened, the car's idle start/stop function stopped working (the engine never shut off at stops). So far, I have not been able to purposely recreate the problem when I try to do so in safe driving conditions. The first time I took it to the dealership, they didn't find any code or anything wrong with it. However, whatever they did caused the idle start/stop function to start working again. This time it has been 6 days and the idle start/stop function hasn't activated once (I have not returned to dealer yet). Acura client relations claims they will have a field technician test my car, but I may have to wait weeks or months for that to happen. Other owners are reporting near identical problems on https://www.carcomplaints.com/acura/rdx/2019/engine/engine.shtml this is going to result in a car crash at some point for some driver, so urgent attention is needed to resolve the problem.

Filed Apr 19, 2019 · Acceleration · 3,970 miles · CA

Uncontrolled acceleration in the two episodes that I described to the dealer when I brought the car in for service, I was unaware of the acc feature. I had not yet, and have still not, used any cruise control or acc. #1. I was in a parking lot of a costco. I had just started the car, backed out of a spot, and proceeded to the end of the row, where I would now turn left onto the main 2 lane (1 in each direction) feeder into the parking lot, from the public street. There was some traffic coming from the left and some coming from the right, but there was room to merge and turn left onto this feeder, to exit the lot. As I began to turn the wheel and slowly press on the gas pedal, the car began to accelerate ' at a much faster rate that was safe in the parking lot, as there were other rows still feeding into this exit drive. I slammed on the brakes, and the car stopped. #2. I had been driving on the freeway for at least 20 minutes and then exited the freeway to go home. As I neared the left turn to enter our street, I stopped to let oncoming traffic clear, and then I released the foot brake and began to turn and slowly press on the gas pedal. Again, the car began to accelerate at a faster rate than was safe onto our narrow street and up a small hill with limited visibility. Again, I slammed on the brakes, and the car stopped ' thankfully out of the oncoming traffic that I had just crossed. In both scenarios, I had not been using any cruise control or acc. It appears, but is not certain, that somehow the acc was active, and when I stopped to turn left, and then accelerated, the acc reengaged and accelerated far more than was safe. I would also point out that 1. In both cases, I was turning left when the acceleration occurred, and 2. In the episode at the costco, I had only just started my car, backed it out of a space, and then proceeded to a turn.

Filed Apr 18, 2019 · Engine · 3,500 miles · PA

I am submitting this ticket to document a hazardous scenario that I have experienced two times since purchasing my brand new 2019 acura rdx. Incidents occurred while driving in ohio and pennsylvania on cool days (ambient temperatures between 30 and 50 deg fahrenheit), with and without rainfall. The following conditions were true for both occurrences. While driving on an interstate highway with adaptive cruise control [with low speed follow] and lane-keeping systems enabled, I decide to overtake a slower vehicle ahead of me. I depress the accelerator pedal without disabling the cruise control functions and change lanes to the faster lane. Just as I execute this maneuver, the engine simultaneously goes into limp mode -- the maximum power output decreases dramatically and the malfunction indication lamp (cel) is blinking. At this point I have to get across all lanes of the highway to pull onto the shoulder, and I have to do this while the vehicle is slowing down. Referencing my owner's guide, I see that the blinking cel indicates a misfire in the engine's cylinders is detected, and as instructed I turn off the engine in a "safe" place and wait for the engine to cool down. When I restart the engine, the cel is cleared and the vehicle resumes normal function. I took my vehicle in for its first service appointment yesterday. I provided this anecdote to my service advisor, and asked that we check error code logs and inspect component systems for damage. I was informed that there were no error codes logged, and that there should be such a log if, in fact, the cel was indicating. All component systems passed inspection/diagnosis. I am attaching a pdf containing the full description text of the ticket submission that I have made to acura client services.

Filed Nov 9, 2018 · Electrical · 440 miles · AZ

Adaptive cruise control failed to detect vehicle in front, near collision. Looks to be related to software/firmware as other instrumentation also appeared to hang/pause. Vehicle was also sold without a working horn