2019 Subaru Forester Engine Problems

My car is a 2019 suaru forester 54,268mi I was driving from Houston to Dallas on the freeway during a thunderstorm on [XXX] [XXX]. I got off the freeway and was almost on the road near my house when my car engine suddenly died, I had no control of my car, my car engine would not start anymore. I had no problems with my car before.

Auto start/stop shut off engine at drive thru line. Locked up brakes and could not get it to unlock and restart car. It has happened on a number of occasions.

The auto stop/start function is erratic. Many times the function fails to start the car after a stop. The car stalls.

The contact owns a 2019 Subaru Forester. The contact stated that while his son was driving at approximately 60 MPH, the check engine warning light illuminated. The contact's son stated that the vehicle was emitting smoke from the exhaust pipe.

The check engine light came on and all of the eyesight components on the car were disabled as I was traveling down the highway at 70 MPH (this included the adaptive cruise control, the lane departure warning, forward collision warning, etc). In addition, the engine thermostat light came on and the heater and defroster stopped working.

4 days ago my Check Engine light came on. In my car, when this happens, it disables all Eyesight features - collision warning, lane departure warning, etc. Work hours being what they are, I drove home that night and back to work the next day with it on.

Dear National Highway Traffic Safety Administration, I am writing to report a safety issue with my 2019 Subaru Forester, which I believe may affect many other Subaru vehicles as well. Specifically, I have experienced a problem with the thermo control valve, which has caused the EyeSight safety features to be disabled and potentially poses a safety risk.

When I turn the car on it flashes check engine eyesite failure which then turns off the ability to use cruise control, crash detection, lane assist, ext. we called Dick Hannah Subaru and the code came up as P26A5 engine coolant bypass valve A position sensor. They said a thermo valve needs replaced and they’ve seen that happen a lot in 2019/2020 Subarus

According to an inspection from the Subaru dealership, my thermo control valve failed. Because of this, the check engine light came on and my safety "eyesight" feature (automatic breaking/collision prevention system) was disabled. This first occurred after starting my car after a visit to a park 2 miles away.

I was driving my 2019 Subaru Forester on 5/16 and it was operating normally that morning with no visible warning lights. I got back into the car later and it started fine. While getting onto a local highway, accelerating to highway speeds, multiple warning lights including the check engine light turned on.

The Thermo Control Valve has failed and threw a check engine light. This disables the Eye Sight System and causes no heat or defrosters. There seems to be a huge backorder with no ETA in sight for the replacement part.

Engine lost power and was misfiring while many warning symbols appeared on the dash. There was a divider separating the lanes. The car coasted to almost to a stop, but the engine chugged enough to slowly turn left at the first opening in the divider and just barely made it off the main road.

At a stop light, auto stop engaged. When foot put on gas, engine died and every warning light the car has appeared on the dash board. It took several tries, but I did get the car started again.

The contact owns a 2019 Subaru Forester. The contact stated that after starting the vehicle, there was white smoke coming from the exhaust pipes. The vehicle was towed to the local dealer who diagnosed that the engine PCV had failed, causing catastrophic damage to the engine.

When I first noticed that my car wasn’t heating properly, it was in May 20 24 when I purchased the car and Carvana dropped it off to my place of residency. When I notified someone of this issue, they told me it probably just needed coolant. I did as instructed and noticed that I was adding in coolant frequently.

When I break and stop the car power is reduced, at times it stalls out and be hard to start again when starting back up in traffic. This is also starting to happen in my other Forrester of the same year.

While driving, the engine stalled and many dash lights came on. The thermo control valve was the cause. There was no warning and fortunately I was able to park off of the roadway.

On [XXX], while driving back home in the evening, the car started to make noises, that became quite loud very fast. I was able to drive to my home, less than 3 miles away, but I could not restart the car anymore. No warning lights were on.

The contact owns a 2019 Subaru Forester. The contact stated while driving 55 MPH, the vehicle started hesitating while depressing the accelerator pedal with the check engine warning light illuminated. The contact activated the hazard lights and coasted the vehicle off to the shoulder.

My thermo control valve went out while I was on the highway. My car lost power and all safety features. It’s been replaced but should be a recall.

Multiple incidences approximately 8 since 2022. Stopped for 8 months with new battery. No issues are recorded in the computer in any of the troubleshooting visits.

Driving home for 15 minutes. parked on left turn lane, slight incline. when traffic light turned green, I stepped on the gas and the engine stalled.

The auto start/stop occasionally malfunctions where the auto stop turns on as expected but then doesn't turn off when you try to use the accelerator. It has happened when a red light turns green the car stalls, displays an error message and you have to restart the car to get moving again. This recently happened to me at a very busy intersection and was very dangerous.

The contact owns a 2019 Subaru Forester. The contact stated that while at a stoplight, the vehicle stalled. The failure occurred on numerous occasions.

2 issues 1. The windshield cracked and the car is less than a year old. The engine pulses as if stuck between gears when doing 75+MPH, especially when going uphill.

Tl* the contact owns a 2019 subaru forester. While traveling 20 MPH, the vehicle stalled and shut off without warning. The contact attempted to restart the vehicle, but was unsuccessful.

My SUBARU has a Start-Stop feature which automatically stops and restarts the engine when the vehicle is stationary for a short time, such as at a stop sign or red light. Several times within the last month I was stopped for a light or stop sign and the vehicle shut down completely. Engine turned off.

Cracked exhaust manifold for no apparent reason. I live in Florida, which does not have extreme temperature fluctuations. It caused toxic fumes to leak into the cabin, confirmed by Subaru tech and handheld carbon monoxide detector.

Engine failed without warning while driving on a busy highway on 4/20/2024. The engine suddenly stopped and tried to automatically restart itself only to immediately shut down, simultaneously dashboard lit up with multiple warning lights ( eyesight disabled, check engine light, RAB off, brake light etc). No power to the car with inability to accelerate. My husband driving the vehicle was able to maneuver the car over 2 lanes in heavy traffic to the rumble strip between 4 lane highway and a 2 lane acceleration entrance ramp. We came within seconds of being hit which could have been a very serious accident. Since the car had no power we weren't even able to get to the right shoulder. We had to sit in the vehicle over 2 1/2 hours waiting for a tow surrounded by high speed traffic on both sides. The cause of engine failure was a defective Thermo Control Valve, diagnostic code P26A6. Subaru recently issued an extended warranty in April for the TCV which is present in many of its vehicles. It should be a RECALL and not just an extension of the warranty since failure can be quite serious resulting in the engine completely shutting down. We had NO previous warning that the car was at risk for unexpected stopping. Car is well maintained with only 34,608 miles (2019 model) and had been in the shop the DAY before the incident getting routine car service. The service manager knew what the problem was by description before even performing the necessary interrogation for diagnostic codes. He was able to get the vehicle to start and drive it into the dealer repair shop by simply removing the TCV before starting. We were the 3rd vehicle in that day for replacement of TCV. He stated they replace 5-10 a week although most present with a check engine light and some with other warnings such as eyesight disabled. The factory original TCV has been replaced with a reportedly revised TCV. Risk of engine failure without warning as result of faulty TCV is putting lives at risk.

The check engine light went on and the diagnostic code read was P26A3, Engine Coolant Bypass Valve is failing in my 2019 Forester, which only has 46,000 miles on it. Subaru was aware that this part was defective in the 2019-2021 models, because in Feb of 2022 the part was replaced and a service bulletin 09-80-21 was issued with instruction for replacing the part, but did not issue a recall, despite this problem causing the advanced safety features to stop working and directly affecting the proper functioning of the engine. My car is just out of warranty, and the quote to have my mechanic replace the part is almost $1200 which I am unable to afford and do not feel I should have to pay for. Subaru should be help to account for this issue.

Thermo control valve failure, P26A3 code, eyesight safety assistance warning light ,check engine light, pre collision braking light, lane assist light.

Check engine light came on roughly 3 days prior to incident. Temperature control/coolant bypass valve failed (replaced by dealer at my expense with now updated design), caused the car to unexpectedly lose power rapidly and enter limp mode, dropping from 55 MPH down to 5 MPH in seconds. The incident occurred on a rural road. I had been on an interstate during rush hour roughly 15 minutes prior and could have caused a crash if the incident happened there.

The thermo control valve (TCV), responsible for regulating cabin temperature and engine temperature failed, causing the vehicle to go into safe mode and was not drivable.

The contact owns a 2019 Subaru Forester. The contact stated while driving at an undisclosed speed, several unknown warning lights illuminated. The contact stated that the audible alert sounds were excessively loud and the warning lights were so bright that the contact became frantic. The contact stopped at a local Auto Zone. The Auto Zone mechanic inspected the vehicle and informed the contact that the failure was due to a failed heater control valve. The vehicle was taken to the dealer where it was diagnosed with a failed heater control module, and it was determined that the heater control valve needed to be replaced. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 79,128.

I started my vehicle and the check engine light came on. In addition, my eye sight turned off and the letter S started blinking. I also had clicking noises when I turned the vehicle off.

The temperature control valve (TCV) has gone bad and so the check engine light is on and reverse automatic braking and the Eyesight system is disabled. The problem with the temperature control valve is unrelated to the safety systems, however, when this valve goes bad, these safety systems are disabled automatically.

Thermo Control Valve malfuncitoned, causing check engine light to come on. Car only has 72k miles on it, so dealership (McDaniels Subaru, Columbia. SC) said they couldn't repair under warranty.

The TCV Thermostat Control Valve has failed which is a known issue and Subaru is very aware. The vehicle will ultimately believe it is overheating and shut itself down. This is a very well known incident and should be a proactive recall but instead subaru insists on waiting for customers to fail and hope its outside of warranty so they can charge them $2k to replace a known faulty design and part.

RAB disabled, eye sight disabled, I drive disabled, check engine light came on. Car drives like it's is in sport mode with very touchy throttle. Pulled a code and it's the TCV.

The contact owns a 2019 Subaru Forester. The contact stated while driving 20 MPH, the check engine warning light illuminated. The contact took the vehicle to the local dealer, where it was diagnosed with needing the temperature control valve (TCV) to be replaced.

The contact owns a 2019 Subaru Forester. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to Auto Zone, where it was diagnosed that the thermal control valve was faulty.

THERMO CONTROL VALVE (TCV) is suspected. I am a member of 2019 Forester group on facebook and reports are quit common for these model year. The check engine light is on and RAB system/eyesight is disabled.

* Eyesight disabled and Thermal Control Valve-P26A3 diagnostic code. Vehicle is available upon request. * Eyesight immediately disabled and maintaining that all safety features are disabled.

The contact owns a 2019 Subaru Forester. The contact stated that on multiple occasions while driving at undisclosed speeds, or while the vehicle was idling, the vehicle lost motive power; however, the engine remained running. The contact attempted to press the START/STOP button to turn the vehicle off, but the vehicle failed to respond.

Check engine light seemed to put vehicle in "limp" mode, cancelling all onboard safety features, I.e. "eyesight", cruise control, vehicle dynamics control, blinking "S" Upon bringing it to a repair shop, they informed me that the thermal value control needs to be replaced, despite having owned the car for only three years. This leads me to suspect either a faulty part or a design flaw.

The Subaru Forester 2019 Thermo Control Valve (TCV) fails. It is responsible for cabin temperature but also engine temperature and can result in overheating. There are numerous reports that this is a frequent problem and dealerships want to charge $1200+ to replace.

2019 subaru forester. Consumer writes in regard illuminated check engine light.

Keep getting check engine light. Blue cold engine light stays on. Getting code P26A5 Engine Coolant Bypass Valve 'A' Position Sensor Circuit Range.

Thermo electro valve failed, tripping check engine lights in the dashboard. I was told that the vehicle was undrivable until the part, which has been affected by supply chain issues, can be acquired by the dealer.

Check engine light came on and code was for the TCV. The dealership said it would be $1500 to repair and was not under warranty…even though my car is a 2019 Subaru Forester with just 17,000 miles. The Subaru forums on Facebook show that numerous other people are also having this problem.

THE ENGINE HAS OIL LEAKED ON THE LEFT SIDE WHICH I REPORTED ON DEALERSHIP SERVICE LAST NOVEMBER 30 2020 AND WAS FIXED AND REPAIRED AT DECEMBER 8, 2020. I SOMETIMES CHECK AND POP UP THE HOOD TO SEE THE LEVELS OF WIPER WASHER, COOLANT, AND OTHER FLUIDS AT LEAST TWICE A MONTH AND NOTICED LAST WEEK MARCH 4 THAT THERE IS AGAIN OIL LEAKED ON THE SAME LEFT SIDE OF THE ENGINE. I CALLED THE DEALERSHIP TO SCHEDULE SERVICE AND THE CAR WAS BROUGHT AGAIN YESTERDAY TO HAVE IT FIX. IT IS ONLY THREE MONTHS OR MAYBE LESS COZ I DID NOT CHECK THE ENGINE LAST 2 WEEKS OF FEBRUARY DUE TO COLD SNOWY WEATHER. MY WORRY IS THAT THE WARRANTY WILL END THIS NOVEMBER OF 2021 AND OIL LEAKED ON ENGINE WILL COME BACK ALL OVER AGAIN AND EVEN AFTER THE WARRANTY.

WHISTLING OR WHINING NOISE COMING FROM A/C SYSTEM AFTER HAVING A/C OR HEAT RUNNING. THIS CONDITION IS FROM THE EXPANSION VALVE ACCORDING TO SUBARU OF AMERICA. DEALER STATES A NEW EXPANSION VALVE FOR THE A/C SYSTEM IS COMING BUT NOT YET AVAILABLE.

LARGE AMOUNT OF SMOKE FROM EXHAUST PIPE AND LOSS OF POWER WHILE DRIVING

Tl* the contact owns a 2019 subaru forester. The contact received notification of NHTSA campaign number: 19v856000 (engine and engine cooling) however, the part needed for the repair was not available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair.

See attached document for complaint

There are two problems: 1 after the car turns off after stopping to save fuel it will fail to restart automatically and must be put into park to manually restart; 2 the car will try to change lanes indicating that the safety related lane change is malfunctioning. I have to fight the car to maintain my lane.

Thermo control valve needs replacing at 34k miles. Not covered under warranty. Also needed new tires at 30k miles and now faulty ignition coil

Thermo Control Valve went bad only after 4 years of owning a car. I do mostly highway driving put very little stress on the car. I think thermo Control Valve going bad just within 4 year.

TCV valve failed and as a result RAB and Eyesight were disabled. The TCV has a known defective design and there is a bulletin about it. MC-10208664-0001

My son's new 2019 subaru forester touring burned to a crisp (total) on saturday, 10/19 in I-95 near new rochelle, ny. Vehicle was in the left lane and the car in front stopped and they hit it, then they were hit in the back, too. Their car burned but the car in front and behind did not.