2020 Subaru Forester

2020 SUBARU FORESTER JUST HAD A CHECK ENGINE LIGHT APPEAR. THE ENGINE MALFUNCTION CODE IS P26A3, WHICH IS A DEFECTIVE THERMOSTATIC CONTROL VALVE. THIS MALFUNCTION ALSO AFFECTS THE VEHICLE MANUFACTURERS ADVANCED DRIVER ASSITANCE SYSTEMS SUCH AS: "EYESIGHT" BLIND SPOT MONITORING, LANE KEEP ASSIST, ETC. VEHICLE ONLY HAS 51,000 MILES ON IT.

The thermo valve leaked into connector, causing engine to shut down abruptly to prevent overheating. This happened at 70 mph on interstate highway in traffic. Part was replaced with modified thermo valve later. Barely able to coast to narrow shoulder flanked by deep ditch, with vehicle very close to interstate traffic, so much so that exit from vehicle ill-advised. After towing, vehicle was serviced by Subaru dealer. At time of part failure many warning lights & messages appeared, but not before the event.

I was driving to work and many of my warning lights suddenly came on. This includes my check engine light, my lane assist light, my auto collision braking, my eye sight disabled and my cool engine light keeps going on and off. My cabin heating also isn’t working. There is no reason for this happening other than my thermo control valve failing.

I was at a red light when the engine shut off and the check engine and several other warning lights came on. After multiple tries I was finally able to restart the vehicle and drive it off the road. After taking it to the dealership the confirmed issue is the Thermal Control Valve. The dealership is requesting about $1600 to replace the faulty part.

On Sunday, [XXX] we were traveling in our 2020 Subaru Forester on a trip from Minnesota to Florida for a vacation. Not long into cross country trip we found ourselves stranded on the side of the highway uncertain about the ability of our vehicle to continue to due to a defective Thermo Control Valve failure. About 200 miles into our trip, while driving at highway speeds south of Rochester, MN the dashboard lit up. The check engine light was on, and other safety features were lit up on the dash as disabled (Eye-sight technology, lane assist, automatic vehicle collision braking). The heat would not work after this incident. We checked the owners manual, and then drove to an Auto-parts store to have a scan done to determine the error code. The code "P26A3 - Engine coolant bypass valve A Range/Performance" was indicated. In checking online we discovered that a Thermo Control Valve replacement was needed ASAP and to continue driving the vehicle could risk severe engine damage. Since it was a Sunday, and we were essentially stranded if we couldn't use the vehicle. We continued on, stopping and checking the engine periodically for overheating. We were able to get an appointment at Lou Fusz Subaru in St. Peters, MO on Monday afternoon and they replaced the Thermo Control Valve at a cost of $1,961.51. We were told that this wasn't under warranty due to the mileage on the vehicle (76,358 miles). In researching this issue online, we found that the Thermo Control Valve failure to be a common issue and certain year/model vehicles and Subaru should have recalled this part a long time ago (in our opinion). INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Started engine after parking and check engine light came on, eyesight disabled, and flashing “s”. Stopped driving and took vehicle to dealer. Diagnosed as thermo control unit. Told they didn’t have a loaner and was safe to drive for a few days. Has no heat and engine would not warm up. No safety systems. Retained 3 days later to dealer when loaner was available. Repaired under powertrain warranty.