2019 Toyota Corolla Speed Control & Cruise Problems

At around 36,500 miles, my Toyota Corolla began experiencing issues with the coolant bypass valve, leading to engine overheating. This malfunction has significantly impacted my ability to drive safely, as the vehicle displays a notification every five seconds, obstructing my view of the digital speedometer and making it difficult to accurately monitor my speed. The issue was not indicated by a check engine light but a persistent "Engine Maintenance Required" message. This defect poses a serious safety risk, and there's a potential class-action lawsuit in progress regarding this very issue, suggesting Toyota might have known about the defect but failed to disclose it. The faulty component is not available for inspection upon request. As more people began to experience similar circumstances, it could lead to fatalities. Other participants to the forums says the issues start when their covered warranty expires. Within these forums there's a inconstancy of service centers honoring fixes, with no cost, knowing that there is an issue. I took the car to both a third-party mechanic and an authorized dealership, and both confirmed the problem. I was quoted $732.85 for the parts and labor within my area. I also called Toyota Global which I was told "a low mileage car shouldn't be having this issue", however, there are countless of forums saying otherwise. **Toyota Models Affected** 2019 Toyota RAV4 2020 Toyota RAV4 2021 Toyota RAV4 2022 Toyota RAV4 2023 Toyota RAV4 2019 Toyota Corolla 2020 Toyota Corolla 2021 Toyota Corolla 2022 Toyota Corolla 2023 Toyota Corolla [XXX] [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I reached a hill using the cruise control at 65mph. The vehicle accelerated to account for the loss of speed due to the hill. The engine accelerated the vehicle to well over 70 mph and revved up to very high rpms. The engine remained at high rpms and higher than normal speeds until I manually disengaged the cruise control. The engine should not be revving up to and remaining at such high rpms for such an extended duration.

The contact owns a 2019 Toyota Corolla. The contact stated while driving 55 MPH and attempting to accelerate, the vehicle failed to respond. There was no warning light illuminated. The vehicle was taken to the local dealer to be diagnosed; however, the mechanic was unable to determine the cause of the failure. The vehicle was not repaired. The manufacturer was notified of the failure and a report was filed. The approximate failure mileage was 18,200

THERE IS A SEVERE SAFETY ISSUE WITH THE CRUISE CONTROL. IN READING COROLLA ON-LINE FORUMS, IT APPEARS THAT IT HAS BEEN A TOYOTA PROBLEM FOR QUITE SOME TIME ' NOT SOMETHING SPECIFIC TO MY VEHICLE ALONE. THE FIRST COUPLE OF TIMES I HAD TO TAKE IT OFF CRUISE - AS IT WASN'T SAFE IN ANY WAY. THE LAST TIME I SET IT WELL BELOW THE DESIRED SPEED WITH NO OTHER VEHICLES IN VIEW SO THAT I COULD TRY TO ALLOW IT TO RUN ITS COMPLETE CYCLE. I WANTED TO SEE EXACTLY WHAT WOULD HAPPEN IF ALLOWED TO RUN ITS COURSE. WHEN I SET THE CRUISE CONTROL, IT SETS FINE. THEN, WHEN I GO DOWN A VERY SLIGHT DOWNHILL, THE ENGINE REVS WILDLY UP TO 4000 RPM, HANGS THERE FOR A LONG WHILE AND PULLS THE CAR UP WELL OVER THE SET SPEED. THEN IT DROPS, INEXPLICABLY, TO APPROX. 3000 RPM, HANGS FOR A BIT, AND THEN DROPS DOWN TO WHERE IT SHOULD BE - APPROXIMATELY 1000 -1500 RPM AND THE SPEED GOES BACK TO NORMAL. WHAT GOOD IS A CRUISE CONTROL IF YOU NEED TO BABYSIT IT? YOU SHOULDN'T HAVE TO TAKE IT OFF BECAUSE IT'S ACCELERATING RAPIDLY OUT OF CONTROL! I READ SOMEONE'S ACCOUNT OF THEIR CAR ACCELERATING UNTIL THEY CAME UP BEHIND SOMEONE ELSE, THE CAR BRAKES CAME ON, AND THEY WERE NEARLY REAR-ENDED BY THE PERSON BEHIND THEM BECAUSE OF THE SUDDEN BRAKING. IT SOUNDS LIKE A TICKING TIME BOMB!

1. Cruise Control 2. Unknown 3. No 4. No 5. No I first reported this to the dealership shortly after I purchased the vehicle. While driving with the cruise control on the rpms begin to jump to 5000 all on it's own but the car isn't speeding up when it happens. I know it's wearing the engine down every time it happens. It happens when I'm driving on flat freeways as well as when driving down hills. The dealership dismissed what I was telling them, but I know there's something not functioning properly and would like it further looked into.

TL* THE CONTACT OWNS A 2019 TOYOTA COROLLA. WHILE DRIVING, THE STEERING WHEEL WENT OUT OF CONTROL. WHILE THE CONTACT WAS DEPRESSING THE ACCELERATOR PEDAL AND ENTERING THE GARAGE, A LOUD NOISE WAS HEARD AND THE VEHICLE ACCELERATED. THE CONTACT DEPRESSED THE BRAKE PEDAL, BUT CRASHED INTO THE GARAGE WALL. THERE WERE NO INJURIES. THE VEHICLE WAS INITIALLY TOWED TO A TOW YARD AND LATER TO A REPAIR SHOP. THE BLACK BOX WAS REMOVED, DIAGNOSTIC TESTING WAS COMPLETED, AND THE ACCELERATION FAILURE WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND PROVIDED CASE NUMBER: 1910112521. THE DEALER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS APPROXIMATELY 14,468. *LN *TR *JS

EVEN ON SMALL HILLS IF THE CRUISE CONTROL IS ENGAGED, THE MOTOR WILL RACE TO 4000 RPMS WHILE THE CAR WILL TRY TO MAINTAIN SET SPEED (OFTEN GOES 3-4 MPH HIGHER). AS THE ROAD LEVELS, THE MOTOR WILL DROP DOWN TO NORMAL RPM'S. I ASKED THE TECH AT TOYOTA AND WAS TOLD HER HUSBAND'S COROLLA DOES THIS TOO. ACTED LIKE IT IS NORNAL.

MALFUNCTION OF CRUSE CONTROL. SET AT 60 MPH ON LEVEL GROUND TACH WILL GO FROM 1600 RPM TO 4000 RPM. NO INCREASE IN SPEED DETECTED. DOES THIS OFTEN. DISABLEING CRUSE CONTROL WILL BRING ENGINE SPEED BACK TO NORMAL.

WHENEVER CRUISE CONTROL IS APPLIED AND I'M GOING DOWNHILL ON THE HIGHWAY, IT WILL ACCELERATE 5 TO 10 MILES AN HOUR AND THE RPM HAND WOULD REV UP DURING THE EXCESSIVE SPEED UP. I WAS TOLD THIS IS NORMAL BUT I DON'T THINK SO.

WHEN CRUISE CONTROL IS ENGAGED AND THE VEHICLE IS TRAVELING DOWN AN INCLINE IT WILL ACCELERATE 5-10 MPH OVER WHAT THE CRUISE CONTROL IS SET AT. FOR EXAMPLE IF I HAVE IT SET AT 65 MPH IT WILL ACCELERATE TO 75-80 MPH ON IT'S OWN. I BROUGHT THE VEHICLE IN FOR THIS TWICE NOW AND TOYOTA CAN NOT FIGURE OUT WHY IT IS HAPPENING. THE RPM'S WILL GET UP TO 4000 AND ONCE THE VEHICLE IS LEVELED OUT AGAIN ON A FLAT ROUTE IT HARD BREAKS TO SLOW THE VEHICLE DOWN.