2019 SUBARU FORESTER Forward Collision Avoidance Adaptive Cruise Control Problems

4/2/2024 at 5:30am my Eyesight system flashed a message in orange that the Eyesight system was off - not temporarily disabled. This is NOT due to an obstruction of the cameras by weather/glare/dirt etc. All functions controlled by Eyesight including lane departure, adaptive cruise control, and forward emergency braking, as well as reverse automatic braking are disabled by this malfunction. I removed the negative lead from my battery in an attempt to reset the system which did not clear the error. No check engine light accompanied this error and all other systems seem to be functioning normally.

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. It was cold and rainy and the window started to fog up and I was unable to clear it without a functioning defroster. This was definitely a safety issue and I had to stop driving. The car was taken to a subaru dealer today and diagnosed with faulty thermo control valve. The technician told me the car should NOT be driven in this condition due to the problem being in the engine coolant system. This is a known issue on the 2019 Forester, and other Subaru models as well, and has a TSB originally...

Check engine light is on and the heater control valve needs to be replaced. This part is on back order because so many vehicles need to have this replaced and it turns off all the safety features of the vehicle. This is unsafe, faulty and putting loyal Subaru drivers in a vulnerable position. This part needs to be a manufacturing recall as to replace out of pocket is close to $2,000 and only effects the AC but impairs the safety of the driver.

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. Even though car has 100K powertrain. To get to this part you have to remove intake manifold, so I don't see how it's not considered part of the powertrain. While Check Engine light is on, NONE of the safety features of this car function. From Internet research, this part is going to fail, (part has been redesigned due to this), it's just a matter of whether it fails within your warranty period or not. Mine was not.

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

Was driving in the right-hand lane on the interstate with the cruise control set, went to change lanes as I was approaching a slower moving semi truck going up an incline. Cruise control deactivated with no inputs from myself. Vehicle began to decelerate. Looked at instrument cluster, the Check Engine Light was on along with Eye Sight Off symbol. Additional symbols for forward collision avoidance and rear active braking were also on. No warning signs were present prior to the cruise control turning off. The unexpected loss of power increases the risk of collision while traveling on the highway. Vehicle was taken a Subaru dealer, diagnosed with code P2682, Coolant Bypass valve performance, with a recommendation to replace the coolant bypass valve.

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. Safety features that are relied upon, disengaged, and aborted for literally a Subaru known engine issue (TSB #09-80-21) - THAT IS SAFETY AT RISK to everyone that owns a Subaru with this issue. * 2 Independent services confirmed diagnostic- P26A3 *Subaru was requested to review when the vehicle was in for recall inspection. * No warning lamps, messages or any other symptoms of the problem prior to the failure. The warning lights and safety features disengaged all appeared at one time.

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. When this part fails there is no defrosters, no crash warning, no emergency braking....

While on freeway at night on 9/28/22 about 8pm several dashboard lights activated including check engine, eyesight assisted safety light, steering and safety controls disabled, all at once! I pulled over and called Subaru for assistance. Called AAA. AAA suggested I drive vehicle off freeway. I went to brothers and he noted car not overheated and drive short distance home. Car manuals did not explain so many warning lights. Drove car to Roseville Subaru next day and determined that engine part had failed to leave for repair. Dealer service agent Raj would not provide any details, strange? Went online and found Subaru Service Bulletin #09-80-21 dated 2/28/22 indicating thermo valve defective causing warning lights, and to replace. I felt unsafe as on freeway at risk at night and am elderly. Subaru bulletin shows part faulty as of June7,21 per s.bulletin. Why not recalled by now? Unsafe to drive this car...