My engine maintenance required screen came on in my car. When I ran the diagnostic, they stated that the coolant bypass valve needs to be replaced in order to prevent the engine from overheating. This seems to happen on all of the 2020 and 2021 Toyota Corollas.

- Orlando, FL, USA

An engine maintenance required popped up in the vehicle and was unable to be removed Took the vehicle to get checked at a Toyota dealership and they advised it was the coolant valve bypass was faulty

- Moreno Valley , CA, USA

Warning display message -??Engine Maintenance Required Visit Your Dealer-??. After diagnostic at the dealer, coolant bypass valve failed and needed replacement with hefty, almost $900 for parts and labor cost. Did research online, and it seems that more vehicles from the year 2020-2021 have experienced the same issue at 30-55k miles, my car is on 106k miles. Please do a recall for this issue and extend warranty to $200k miles. This car should not have this sort of issue!

- Fredericksburg , VA, USA

engine coolant bypass valve issues under 70k miles

- South Jordan, UT, USA

The engine coolant bypass valve needed replacement at around 70,000 miles. Similar replacement have been needed in other corollas models of the same year.

- Westlake, FL, USA

Engine maintenance required light comes on and it wont go away. Happened around 65000 miles. It is cracked engine coolant bypass valve. It is happening to all toyota corolla 2020s. Dealer is asking $1200 to fix it.

- Pembroke Pines, FL, USA

Engine coolant bypass valve failed at 36,981 miles.

- Palatine, IL, USA

Dashboard stated engine maintenance required- visit your dealer and it turned out to be a bypass coolant valve malfunction per Toyota mechanic specialists.

- Salinas, CA, USA

Experience with a faulty Coolant Bypass Valve. Read enough information of this being a problem with newer toyotas (RAVs, Camrys, Corollas, etc.). Cannot get rid of Engine Maintence Required notification on dash which pops up every 10 seconds when I-??m driving after I dismiss it. This specific notificaiton is also NOT in the Toyota Manual whatsoever, and no it is not the Maintenance Service Required notification that comes up every 5,000 miles for basic check up.

- Whittier, CA, USA

My 2020 Toyota Corolla had a warning light turn on, on 3/20/2024. The warning read "Engine Maintenance Required". I looked up this issue and read that many people were having similar issues with the coolant bypass valve. I took my car to my local Toyota dealership and they confirmed it was the coolant bypass valve. The risks included in this failure can be overheating and engine damage.

- Riverside, CA, USA

Had my car (Toyota Corolla 2020 SE) give a -??engine maintenance required, take to a dealer-?? error message on my digital dashboard. No error codes from any maintenance device but apparently only the Toyota dealership can find this in the software using their computers to find it somewhere deep in there-?? The problem is the upper engine coolant bypass valve. This is costing me almost $1000 including the $80+ in diagnostics that ONLY the Toyota dealership can see and find out. Apparently this is a very common occurrence with the 4 cylinder corollas and RAV4s.

- Panama City, FL, USA

Engine Coolant Bypass Valve replacement, Toyota is charging me 888 dollars for repair.

- Pacoima, CA, USA

I discovered that my 2020 Toyota Corolla SE has a Coolant Valve Bypass malfunction coded "p2688115". I have also discovered this a prevalent issue after you hit 70,000 miles. There are forums all over the internet with complaints about the same issue as mine. I did some research and found no recalls. With this being such a common issue for no reason, faulty equipment. The car has been inspected by a Toyota dealer in Bradenton, FL because we had thought the service vehicle message was for a tire rotation. They scanned the vehicle and discovered the fault code "p2688115" after trying to reset it numerous times. The senior tech was the one who scanned it. He knew the exact reason why it was not clearing before scanning the vehicle. He only scanned it to solidify his hypothesis. I then spoke to the service team, they wanted me to bring it in for a diagnosis that would cost $85 if my warranty did not cover it. The cost of the part was estimated at around $150 plus labor and taxes. It was over a $400 repair. For a repair as such, this needs to be recalled. The warning message never went away, if you tried to clear it to view the screen you had about three seconds before it came back on. It is a major safety risk for those who wear glasses and drive at night. I use the screen to keep myself safe and maintain my driving speed. This warning message came on around 70,000. Some so many other individuals have experienced and complained about the same problem. This needs to be escalated. I am not allowed to utilize the safety features my car has to offer. Please take action and commence an investigation.

- Bradenton, FL, USA

After bringing my vehicle in for its oil change and tire rotation, a warning message showed up from my car saying "Engine Maintenance Required". After checking with my dealer, they said that the coolant bypass valve needed to be replaced. My car only has 33,000 miles and has had no issues whatsoever.

- Doral, FL, USA

After I had brought a my car to the dealer for its oil change and tire rotation, a warning message came from my car saying "Engine Maintenance Required". After checking with my dealer, they said that the coolant bypass valve needed to be replaced. After checking online, it seems that this is a common problem for recent Toyota vehicles.

- Doral, FL, USA

Coolant bypass valve leaks through wiring and damages itself.

- Zephyrhills, FL, USA

The coolant bypass valve in some Toyota models has been malfunctioning recently and has become a common issue. Dealer confirmed that this was the issue per attached diagnostic report/invoice copy. Costs were >$800 to repair the issue for a <$100 part and 30 minutes of labor. The "Engine Maintenance Required" warning was visible in the display. Unsure as to the short or long-term effects of this malfunctioning part, but as it's related to the cooling system of the vehicle, it may trigger other more serious issues.

- Miramar, FL, USA

Around 40k miles I received an Engine Maintenance Required warning. After some research Engine Maintenance and Engine Service Required are two very different indicators. I received and P2681 code meaning the electrical coolant bypass valve had failed unfortunately one can-??t tell if it-??s stuck shut or open this could lead to one-??s care over heating and or damaging one-??s engine. After some research I-??ve come to find out most 2020-2024 corollas have been having this issue tends to happen about 30-50k miles

- Perris, CA, USA

Coolant bypass valve failure. Replacement part carried the same defect.

- Pfluggerville , TX, USA

In the past week at 30,700 miles, my 2020 Toyota Corolla "Engine Maintenance light; see dealer" service light appeared on the dash. Through talking with a Toyota dealer, they are aware of this issue with Corollas, Camrys, and Rav4's. It is an engine coolant bypass valve, and appears to be faulty in many vehicles according to youtube videos, google, and Toyota service. Perhaps this needs to be a recall? Also, the dealer wants almost $800 to repair even though many people do it on youtube in under an hour. Parts are less than $200, and 1.5 hours of labor do not add up to $800.

- Duncan, SC, USA