2019 TOYOTA COROLLA Engine Problems

Faulty slave cylinders , that lead to more damage such as the clutch & flywheel and

I have a 2019 Toyota Corolla Hatchback. The problems started on July 21st, 2025. While driving my 2019 Toyota Corolla Hatchback, I noted white exhaust smoke, even after the engine was warm. One week prior, I had filled the coolant reservoir, but when I checked it, the coolant was almost gone again. There were no visible leaks or puddles under the car. I refilled the coolant, but within days the car began shaking severely upon startup and emitted a coolant-burning smell. 5 minutes after, multiple warning lights illuminated on the dashboard simultaneously. I replaced the car battery, and the warnings disappeared. However, while merging onto the freeway, the same warning lights came back, the car lost power, and I could not accelerate above ~25 mph. If this occurred in heavy traffic, it could lead to a serious collision. I exited the freeway and had the car towed. DTCs from the independent mechanic and the Toyota dealer included: P11ED00 P030085 P030027 P030200 (Cylinder 2 misfire) C142571 (Stop light relay actuator stuck) U1117 B2284 B15AD The Toyota dealer identified a “Port Injector #2 malfunction” and recommended replacing all four injectors (~$2,000) but could not confirm this would fix it. They noted a coolant-burning smell but advised addressing the misfire first before further diagnosis. There is an active class action lawsuit alleging that 2019–2023 Toyota Corolla and RAV4 models have defective coolant bypass valves that may cause engine issues, overheating, or coolant loss without visible leaks. This matches the coolant loss, white exhaust smoke, and eventual power loss while driving. I request that NHTSA investigate this issue in connection to the reported coolant bypass valve defects affecting 2019–2023 Toyota Corolla models.

While driving my 2019 Toyota Corolla Hatchback XSE, I lost almost all power to my accelerator and a check engine light appeared on my dash. I came to a stop and stalled the vehicle, once it stalled I turned the engine back on and shifted into reverse a felt and heard a loud clunk noise coming from right under my car and its not only shifting into reverse is the loud noise active but its also shifting into drive from reverse. I scanned my vehicle with a aftermarket scan tool and got 2 exact same codes for "Torque Converter Clutch Pressure Control Solenoid Control Circuit Performance/Stuck Off" and then two more codes for "Torque Converter Clutch Pressure Control Solenoid Control Actuator Stuck On". My torque converter in my CTV transmission failed. I was not at a risk of putting other people or myself in danger but if would have if i was moving faster at the time this happened. I have done my research on the recalls that are active on this vehicle and on the Toyota OEM TIS website there is only 1 recall that was taken care of in 2021 for the fuel pump and then there is a Warranty Enhancement Program for the Flow Shut-off Valve Coolant Leak. I did not find anything on that Toyota TIS website about the CVT recall but when i search my year, make and model on the web, I see that there is a recall for about 3,400 vehicles in the USA and nearly 1,000 in Canada that have a active recall for the CTV. I also saw the recall consequence and it matches up with what happened with my Corolla. I have attempted to contact 5 difference Toyota dealerships in my state to have them help me figure out the issue I am having with my vehicle not being listed in the recall but my CTV just failed. No one has reached back out in the past two days and I am continuing to call almost 3 times a day. I would like some clarity on how I should go about handling this issue.

I got an “engine maintenance requested” notification on my car. I took it to a mechanic and they said the coolant bypass valve is defected

Engine Coolant Bypass Valve Issues/Faulty. No problems prior to “engine maintenance message”. Message only comes up when the A/C is turned on.

Manual driving shaft slips out of 6th gear while driving affecting the driving speed and increasing RPMs.

As I was driving my check engine light turned and also another message saying “Drive-Start control malfunction”. A few second after another light came one showing “Engine coolant Temp high. On 11/24/24 I experienced this mechanical failure as I was driving. I was driving behind another car, where my car suddenly lost power and randomly accelerated almost causing me to crash behind the car in front of me. Thankfully I had time to press on the brakes to prevent me from crashing. I also did some research to see if other drivers also experienced this fault and seems that a lot of people with these Toyota Corolla and RAV4 models. I also found that an active lawsuit is ongoing against Toyota regarding this same issue. This definitely should be something that needs to be recalled as it puts our lives at risks to either crash or even catch on fire due to overheating. My vehicle gets serviced regularly.

I got a “Engine Maintenance Required” warning message. I check with the dealer and upon diagnosis told me about a faulty coolant bypass valve which is a common problem for Toyota RAV4 and Corolla. The Toyota Mechanic mentioned that this should have been a recall issue. The cost to repair was unbelievable considering it will take only a short time to do. BOught the parts and will have it installed somewhere where the labor is cheaper. Since it is a common problem, the manufacturer should recall this issue, replace the faulty part and pay the cost of everything.

The coolant bypass valve failed in my car causing “engine maintenance required” message but no CEL code. Took it to the dealership where they determined failed component and replaced it. The car only had about 71,000 miles and with a engine cooling system failure it could potentially cause further damage.

The alert for the Bypass Coolant Valve came on and cost $800 to replace. As this is a common issue across multiple Toyota models, this should be a recall.

My car has warning light of the engine maintenance required and I had to change my electrical water pump when I first got the car and the dealership doesn’t cover the issues

Coolant bypass valve failed

Engine coolant bypass valve

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 am up to date with all my maintenance but at 67k miles I had a message stating “Engine Maintenance Required” message on my dashboard. I took it to the dealership and they identified the cooler bypass valve needed to be replace, apparently this is a common issue and has not been addressed by Toyota. Plus it’s difficult to find the part that needs to be replaced. There was no check engine light, and everytime I turned on the AC the engine maintenance required message would pop back up. If this is a known issue Toyota needs to make this issue public and parts available.

I got a “Engine Maintenance Required” warning message. I check with the dealer, the dealer inspected and told me about a faulty coolant bypass valve which the dealership told us a common problem for Toyota RAV4 and Corolla. The dealer did a diagnostic and found that engine coolant bypass valve circuit short to battery - (P268115). They asked me to order the part. A faulty coolant bypass valve risked my vehicle of a failure of the cooling system and so the engine. I had to pay $113.40 for the diagnostic and $331.75 for repair. Since it is a common problem, the manufacturer has to recall and replace the faulty part and pay the cost of the part and labor for replacing the faulty part.

Coolant bypass valve is faulty and a lot of people have had this issue. Toyota is well aware of the faulty part and it affects many models and years of cars. They want to charge 800 bucks for an easy fix. It is robbery and could be a big safety hazard if it causes engine to stall while driving

All of sudden the Engine Maintenance Required sign popped up on the screen during when I was driving. The sign popped up every time I turn on the car. I took the car to Toyota service immediately and diagnostic showed it was Engine coolant bypass valve circuit short to battery or open.

* What failed was engine coolant bypass valve. * Safety was at risk as the failure can lead to engine overheating over time. * it has been reproduced by countless others after their vehicle hits 30k to 70k. *there was a message on the dash about “engine issues and to take to dealer”

Engine Coolant Bypass Valve faulty. Charged $176.95 for the dealer to diagnose what is already known issue. The dealer wanted $663 to replace the part. Toyota knows about this issue yet acts like they had to perform $176 diagnose. The car never blew any codes CIL and they say that this particular part doesnt cause a code but had to use a " special" diagnose tool.

My service engine came on took to dealership they said my coolant bypass valve no good and iam always have to change out my brake pads on the front

Engine coolant bypass valve circuit short to battery or open - code P268115 Engine maintenance alert light appeared after (a day after, and then would not be on, and sometimes turn on, erratic maintenance message) I brought car in for scheduled engine maintenance per Toyota. The Toyota technician advised me to immediately take care of it but does not have the part in stock. This is the Toyota Dealer service in Manhattan Beach, CA.

ENGINE MAINTENANCE CAME ON, TOOK IT TO DEALERSHIP AND WAS TOLD THE DIAGNOSTIC TEST SHOWED COOLANT BYPASS VALVE. APPARENTLY THIS IS A RECURRING ISSUE AND IF NOT TAKING CARE OF, IT COULD CAUSE MAJOR PROBLEMS. I WAS TOLD THE PART IS $200 PLUS AND LABOR IS $500 PLUS. THIS SHOULD BE A RECALL ISSUE AND FIXED FREE OF CHARGE BY TOYOTA. IN DOING A GOOGLE SEARCH, SEVERAL COMPLAINTS ARE LISTED REGARDING THIS ISSUE. THE GENTLEMAN AT THE DEALERSHIP WHERE I TOOK MY CAR STATED HE HAS DONE SEVERAL VEHICLES RECENTLY WITH THIS ISSUE. I DON'T THINK USE AS A CUSTOMER SHOULD HAVE TO PAY FOR THIS KNOWN ISSUE BY TOYOTA. I'M ALSO STILL WAITING TO GET THE RECALL FIXED ON MY MOTHER'S TOYOTA RAV4 RECALL WHICH I RECEIVED NOTIFICATION ON BACK IN EARLY 2023. THEIR EXCUSE IS NOT PARTS AVAILABLE. SO IN THE MEAN TIME, IF THE VEHICLE CATCHES FIRE, THEY SAY OH WELL. I AM OVER TOYOTA GETTING AWAY WITH THIS.

4 years after production with approx 44k miles the car began displaying the message “engine maintained required visit dealer” after investigating discovered coolant valve was the issue. Problem seems to be a common occurrence with the model car for other owners.

The vehicle began to go up and down in revolutions per minute (RPM) while at a traffic light or stop sign.

Coolant bypass valve failed prior to car driving 50,000, confirmed by dealership. Failure can cause electrical issues. Car indicated engine maintenance required

I was at a red light. When the light turned green and I pressed the accelerator the car wouldn’t move. The check engine, charging system malfunction and electronic power steering system warning light appeared on dash. Car locked up. I moved car into neutral and then drive and car was able to move. Took it to dealer next day. Cars almost ran into the back of me! I had just turned on the street from I-85! So far it hasn’t been reproduced at dealer.

Motor mounts failed on a 2019 Toyota Corolla. Replaced for an exorbitant amount of money. Never had this happen on any of my cars. Engine was rocking back and forth when acceleration and when I stopped. This could have damaged other components in the car resulting in my safety.

The contact owns a 2019 Toyota Corolla. The contact stated while driving at 60-65 MPH, the vehicle shut off and lost electrical power. All the instrument panel warning lights including the lane departure assistance warning light illuminated. The contact was able to veer to the side of the road. The vehicle failed to restart. The contact then refilled gas in the vehicle with assistance and was able to restart the vehicle. However, the failure reoccurred while driving and the vehicle failed to restart after several attempts. The vehicle was towed to an independent mechanic but was not diagnosed or repaired. The contact was able to restart the vehicle and drove to his residence. The contact stated while at a complete stop, another vehicle driving at 45 MPH crashed into the rear end of his vehicle. The air bags failed to deploy and the seat belts failed to engage. The contact sustained soreness and bruises on the upper and lower back and on the right arm and right shoulder. The passenger occupying the front passenger seat sustained head and neck injuries from slamming their face on the dashboard. The passenger occupying the rear passenger seat sustained whiplash, and neck and back injuries. The contact was able to drive to a hospital where the two passengers and himself received medical assistance. A police report was filed. An unknown dealer was notified of the failure. The manufacturer was notified of the failure but did not provide any assistance. The vehicle was not diagnosed or repaired. The failure mileage was approximately 13,000.

Mileage: 13,000

Unknown engine runs really poor at idle I was ac is and is really loud transmission jerks and spark plugs replaced

Fuel is not filling up all the way. Fuel has once splashed out when stopped automatically. Used to have around 445 miles per tank, but now around 395. It had started around 59000 miles. I have had the dealership inspect and see if their were engine codes but there weren’t any. The time and care shouldn’t stop just because the check engine light isn't on as it may be a safety or mechanical issue in the future. I would like my car to be looked into as it may be in line with the fuel pump issues on the 2018 Camry, a family member owned one that was recalled for a fuel pump replacement so maybe a Corolla wouldn’t be to uncommon as well to have a know problem from the same company. I present with the utmost respect and hope I can get assistance and guidance on this minor issue as of now. Thank you for taking the time to read. Best Regards, A Toyota Corolla Hatchback Owner.

TL* THE CONTACT LEASED A 2019 TOYOTA COROLLA. THE CONTACT STATED THAT WHILE THE CRUISE-CONTROL WAS ACTIVATED AND GOING DOWNHILL, THE RPMS ROSE TO 1800 RPM AND TO 4000 OR TO 5000 RPM. THE CONTACT STATED THAT TO PREVENT THE FAILURE HE HAD TO TURN OF THE CRUISE-CONTROL OR DEPRESS THE ACCELERATOR PEDAL. NO WARNING INDICATOR LIGHTS WERE ILLUMINATED. THE CONTACT STATED THAT THE FUEL ECONOMY WAS AFFECTED BY THE FAILURE. THE VEHICLE WAS TAKEN TO WESTBURY TOYOTA (1121 OLD COUNTRY RD, WESTBURY, NY 11590), WHERE THE VEHICLE WAS TEST DRIVEN AND THE MECHANIC DUPLICATE THE ISSUE BUT INDICATED ON THE PAPERWORK THAT THE ISSUE WAS NORMAL VEHICLE OPERATION. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 12,800.

Mileage: 12,800

TL* THE CONTACT OWNS A 2019 TOYOTA COROLLA. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 20V012000 (FUEL SYSTEM, GASOLINE). THE CONTACT STATED THE VEHICLE FAILED TO START UP. ADDITIONALLY, THE VEHICLE FAILED TO SHIFT OUT OF PARK WITH SEVERAL UNKNOWN WARNING LIGHTS ILLUMINATED. THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE VEHICLE WAS TOWED TO SLOANE TOYOTA OF GLENSIDE (503 N EASTON RD, GLENSIDE, PA 19038, (215) 885-5400) AND IT WAS CONFIRMED THAT THE PART WAS NOT YET AVAILABLE. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 10,000. VIN TOOL CONFIRMS PARTS NOT AVAILABLE.

Mileage: 10,000

WE HAVE BEEN NOTICING IT FOR A WHILE KNOW BOTH MY PARTNER AND I THE CAR STALL'S ON OCCASIONS OR DOES NOT REACT WHEN YOU ARE TRYING TO ACCELERATE IN THE FREEWAY. CHECKED WITH TOYOTA BUT SAID NO RECALLS BUT THERE IS SOMETHING DEFINITELY NOT WORKING CORRECTLY.

Mileage: 4,000

TL* THE CONTACT OWNS A 2019 TOYOTA COROLLA. THE CONTACT STATED THAT WHEN DRIVING APPROXIMATELY 30 MPH AND UP, THE VEHICLE WOULD SEEM TO REV UP EXCESSIVELY, AS IF THEY HAD A LARGE ENGINE. THE FAILURE OCCURRED WHEN THE ACCELERATOR PEDAL WAS DEPRESSED. THE CONTACT HAD NOT TAKEN THE VEHICLE TO A CERTIFIED MECHANIC OR DEALER. THE VEHICLE HAD NOT BEEN OFFICIALLY DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 6,000.

Mileage: 6,000

ON MARCH 2, 2019 I PURCHASED A BRAND NEW 2019 TOYOTA HATCHBACK FROM TOYOTA OF RICHARDSON. AFTER ONLY OWNING THE CAR FOR 3 WEEKS I RECEIVED A NOTICE FROM MY VEHICLE'S ALERT SYSTEM THAT THERE WAS A SAFETY RECALL ON IT. I WAS NEVER TOLD THIS BY THE AUTO DEALER OR BY TOYOTA. THE RECALL WAS DUE TO AN ERROR WITH THE MANUFACTURING OF THE VEHICLE. IN RESEARCHING THIS, I FOUND THAT IN DECEMBER OF 2018 THIS RECALL WAS PUBLICIZED ON THE WORLD WIDE WEB AND WITH NHTSA. THE TORQUE CONVERTERS IS DEFECTIVE AND COULD CAUSE A CRASH WHEN THE CAR HAS RAPID ACCELERATION. THE VEHICLE COULD SUDDENLY LOSE POWER WHILE DRIVING. MY DAUGHTER, WHO IS THE CO-OWNER OF THIS VEHICLE, IS THE PRIMARY DRIVER. SHE HAS 4 CHILDREN, IN WHICH ONE IS HANDICAPPED. SHE AND HER CHILDREN HAS BEEN AT RISK WHEN DRIVING AND/OR RIDING IN THIS VEHICLE SINCE THE PURCHASE DATE. SO, FOR 3 WEEKS MY FAMILY WAS AT RISK OF HAVING AN AUTO ACCIDENT DUE TO A MANUFACTURER'S DEFAULT IN WHICH A RECALL WAS ISSUED 3 MONTH PRIOR TO THE PURCHASE OF THIS VEHICLE! YET THE DEALER DID NOT TAKE THE TIME TO FIX THIS PROBLEM PRIOR TO OUR PURCHASE. THIS IS RIDICULOUS!!

TL* THE CONTACT CALLED ON BEHALF OF HER NIECE WHO OWNS A 2019 TOYOTA COROLLA. WHILE DRIVING 70 MPH, THE VEHICLE STALLED WITHOUT WARNING. THE CONTACT WAS UNABLE TO RESTART THE VEHICLE FOR APPROXIMATELY TEN MINUTES. ONCE THE VEHICLE WAS RESTARTED, THE DRIVER SHIFTED INTO DRIVE, BUT THE VEHICLE ROLLED BACKWARDS. THE VEHICLE WAS TAKEN TO CLASSIC TOYOTA (LOCATED AT 1717 W SW LOOP 323, TYLER, TX 75701, (903) 579-0655), BUT WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 9,179.

Mileage: 9,179