THIS VEHICLE IS NOT SAFE TO DRIVE SINCE SUBARU COULD NOT REPLICATE THE ORIGINAL OVERHEATING PROBLEM IN THE TRANSMISSION. THEY MADE AN EDUCATED GUESS REPAIR TO SEE IF IT FIXES THE OVERHEATING PROBLEMS IN THE TRANSMISSION WHICH MAY MALFUNCTION DURING DRIVING THE VEHICLE,SLIPPAGE, TO LOCKINGUP. This afternoon, while my daughter was driving through the Mojave Desert on her way back home to Mammoth Lakes, Ca.; her dash light came on- AT OIL TEMP Warning, forcing multiple stops to cool the vehicle. The trip back to Hacienda Heights took over four hours (4) in extreme heat. I’ve attached a photo of the dash warning for your reference. After she called me from the road, I instructed her to turn around and wait for the warning light to turn off. (Google’s guidance emphasized cooling the transmission before resuming travel). Thankfully, the route [XXX] from Mojave was mostly downhill, which helped reduce strain on the vehicle—but it was still a stressful and exhausting experience. MY LETTER SUBARU I need to be candid: my time and patience are wearing thin. I’ve remained cooperative throughout this process and paid about $644 out-of-pocket for repairs specifically recommended by Ocean Subaru—including the initial solenoid replacement, CVT oil cooler, and thermostat. While I appreciate that the remaining repairs were performed under goodwill, the original overheating issue remains unresolved, and its root cause is still uncertain. SUBARU HASN'T REPAIRED THE PROBLEM. S Regarding future repairs or services, we cannot guarantee coverage until the details of any needed repairs are identified and thoroughly reviewed. If there are any updates or if further repairs are recommended, please feel free to let me know in a direct reply, and I will do my best to assist you. Thank you again for your understanding and patience. Sincerely, Michael Subaru of America, Inc. Customer Advocacy Department 1-800-SUBARU3 (1‑800‑782‑2783) ext. 119949 Case Number: 250725-1500342 INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMA
Subaru Forester overheating problems
58 of the 6,539 owner complaints about the Subaru Forester describe engine overheating, most of them for the 2019 model year.
- owner complaints
- 58
- worst model year
- 2019
- typical repair cost reported
- $1,900
- typical mileage
- 78,151
By model year
Often reported together
Check engine light 16Engine failure 7Warning lights 4Stalling 3Oil consumption 3Lane assist 3Fire or smoke 3Loss of power 2
Trouble codes mentioned
P26A3 1P2682 1P2138 1
What owners say
The Thermo Control Valve failed and the engine overheated in April 2025. The car has only been driven 1,200 miles since then and the engine failed at 65,000 miles likely due to the TCV failure and engine damage.
Engine overheating and causing multiple problems
P2682 Engine overheating and engine gauge flashing red due to a recall related to the engine coolant bypass valve. The vehicle stopped and required a tow for $417 to the nearest Subaru dealership to repair. After towing to the dealership they charged 31% of parts to labor and would not eliminate or discount the invoice.
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.
Thermo control sensor failed which will damage the motor if overheating dealer says it's going to cost me $1500 and it isn't covered under drivetrain warranty which is 5 years 60000 miles I have 27000 miles
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)
While driving on a highway outside Milford, CT my vehicle is check engine light suddenly illuminated. I had a sudden loss of power, no heat, and the engine temperature was unable to read. Engine temperature was not accurately reporting and showed it as being cold as indicated by blue light warmup light. My eyesight, pre-collision system, and sport mode was disabled due to the engine light being illuminated. The vehicle was seen at a Subaru dealer, who diagnosed the issue to be the thermo control valve. Dealership informed me that it was unsafe to drive and I risk complete engine failure, overheating, and or fire if I continue to operate without required repair. As a result, I was stranded overnight, three hours away from home. Repair was completed on [XXX] at cost of $1830. I learned at the dealership that this is a known issue, in 2021 Subaru replace the plastic components of this part with aluminum due to similar issues experience by many customers. Customers are reporting vehicles going into “limp mode” and even engine damage. I learn that there is a class action lawsuit regarding the same issue, which can be reviewed here: [XXX] Please help to recall vehicles and push Subaru to repair/refund. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
2019 Subaru Forester with 38,000 miles. Heat stopped working. 30 minutes later, check engine light came on. Warning on dash stating that Eyesight cannot turn on. Lane assist and adaptive cruise control will not turn on. Mechanic found it needs the Thermo Control Valve replaced or the car will have no heat and the engine can overheat. Quoted a $2,000 repair cost and 3 weeks before we can get the part.
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. I managed to get it scanned when it popped a code for the Coolant Bypass Valve. Searching that code online lead me to DOZENS AND DOZENS of forums, posts, stories of the same code popping up on other 2019-2020 Subaru's. They all had to take it in for a hefty repair. It also led me to a Service Bulletin issued last year, which showed that Subaru had rebuilt the TCV so it could withstand corrosion, unlike the previous version. So naturally I took it into my local dealership to have it looked at, and sure enough - the TCV needed to be replaced. WHY HASN"T THIS PART BEEN RECALLED YET??? Given there is no thermostat on my cars dash, I would have no clue whether my car was overheating due to this faulty valve, until its too late. It seems like this is a big potential safety issue that Subaru needs to address, and someone needs to force their hand.
Related recalls
Engine and engine cooling
- What is wrong
- Subaru of America, Inc. (Subaru) is recalling certain 2024 Forester vehicles. The engine water pipe may have loose attachment bolts, allowing the pipe to lose its seal and leak coolant.
- Risk
- Leaking coolant can contact a hot exhaust pipe, increasing the risk of a fire.
- Remedy
- Subarus independent distributor processing facilities will tighten the water pipe attachment bolts. The affected vehicles have not been delivered to dealers or sold to owners and therefore, no owner notification letters will be sent. Owners may contact Subaru's customer service at 1‑844‑373‑6614. Subaru's number for this recall is WRO-23.
Recall number 23V723000 · Recall details
Engine and engine cooling: exhaust system: emission control: crankcase (PCV)
- What is wrong
- Subaru of America, Inc. (Subaru) is recalling certain 2019 Crosstrek, Forester, and Ascent vehicles. The aluminum Positive Crankcase Ventilation (PCV) valve can separate, allowing the separated components to enter the engine, resulting in a loss of power while driving.
- Risk
- An unexpected loss of power while driving can increase the risk of a crash.
- Remedy
- Subaru will notify owners, and dealers will inspect and replace the PCV valve, free of charge. If the PCV valve has separated and the components cannot be found, the short block engine will be replaced, free of charge. The recall began January 31, 2020. Owners may contact Subaru customer service at 1‑844‑373‑6614. Subaru's number for this recall is WUW-08.
Recall number 19V856000 · Recall details
Engine and engine cooling: engine: gasoline: turbo/supercharger
- What is wrong
- Subaru of America, Inc. (Subaru) is recalling certain model year 2015-2016 WRX vehicles manufactured April 10, 2015, to October 21, 2015, and Forester 2.0XT vehicles manufactured April 10, 2015, to October 20, 2015. The turbocharger air intake duct may crack and possibly result in an engine stall.
- Risk
- An engine stall increases the risk of a crash.
- Remedy
- Subaru will notify owners, and dealers will inspect the turbocharger air intake duct, and replace it as necessary, free of charge, depending on the lot number found on the duct. The recall began April 2016. Owners may contact Subaru customer service at 1‑800‑782‑2783. Subaru's number for this recall is WTA-62.
Recall number 16V162000 · Recall details
Engine and engine cooling: engine
- What is wrong
- Subaru is recalling 16,715 my 2007-2008 legacy sedans and wagons, my 2008 impreza sedans and wagons, and my 2009 forester vehicles. Some vehicles may have the cylinder head-side oil supply pipe and turbocharger-side pipe improperly assembled.
- Risk
- Vibration would occur while driving and, over time, could eventually result in cracking the pipe which would allow oil to leak. If leaking oil contacts components operating at high temperatures, an engine compartment fire could occur.
- Remedy
- Dealers will inspect for cracking or an oil leak at the oil supply pipe at the cylinder head-side. An additional bracket will be installed to increase rigidity of the pipe and the pipe assembly will be replaced with a modified part. The recall began on october 20, 2008. Owners may contact subaru at 1‑800‑782‑2783.
Recall number 08V460000 · Recall details
Engine and engine cooling
- What is wrong
- On certain passenger and sport utility vehicles, the cover bolts for the engine oil control valve may not be sufficiently tightened, allowing oil to leak from around the cover gasket.
- Risk
- If leaking oil contacts components operating at high temperatures, a fire could result in the engine compartment.
- Remedy
- Dealers will inspect and retighten the oil-flow control valve cover bolts. The recall began on october 8, 2004. Owners should contact subaru at 1‑800‑782‑2783.
Recall number 04V473000 · Recall details
Questions about the Subaru Forester overheating
Which Subaru Forester years have engine overheating problems?
The model years with the most reports are 2019 (9 complaints), 2020 (7 complaints) and 2010 (5 complaints).
How much does it cost to fix engine overheating on the Subaru Forester?
Owners who mentioned a price put the repair at about $1,900 (median of 16 complaints that include a dollar amount). Costs vary with mileage, warranty and where the work is done.
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