coolant bypass valve is defective and failed prematurely. coolant bypass valve cracks and leaks coolant. Once coolant beings leaking, it comes into contact with the electrical connector located near the valve. The coolant corrodes and damages the connector, which eventually causes connector to malfunction. This causes the coolant bypass valve to be stuck in the -??open-?? or -??closed-?? position (i.e. it no longer responds to the needs of the engine), restricting coolant flow and allowing the engine to overheat. I had to repair the vehicle at Harvey's Autotech 521 West Sixth Street Corona, CA 92882 (951) 737-9878 at the cost of $643.91and loss of a work day.

- Orange, CA, USA

I was driving in traffic when a warning light comes on it says "engine maintenance required visit your dealer". I have looked everywhere in the manual on this message and unable to find anything no other lights are on or anything to determine the issue. Took it to get checked at autozone no codes came up all is clear. I've read online this is a known issue to replace the coolant bypass valve. Unfortunately I take my vehicle to toyota for all oil changes etc and this was not mentioned.

- Chula Vista, CA, USA

Engine coolant Bypass Valve issue

- Ralston , NE, USA

Faulty coolant bypass valve needing repair. Manufacturer has open class action lawsuit. My car is also impacted.

- Pineville, NC, USA

An engine maintenance required warning displayed on the car dashboard. Crown Toyota Ontario performed diagnostic inspection and detected that code P268115 - engine coolant bypass valve was defective. Based on research the P268115 - engine coolant bypass valve is a common failure to Toyota Corolla, RAV 4 and Camry by car owners for models manufactured in 2019 - 2023. Toyota Ontario advised that the defect is not covered by warranty. My corolla is a 2020 model with 77,379 mileage on it.

- Eastvale, CA, USA

I had called Toyota colonial dealership in Milford CT. After briefly speaking with the service representative, he advised that it-??s most likely the engine coolant bypass valve. He said that it is common with my car models. I did some extra research and found out that many others were having the same issue from only having the car for a few years.

- Bridgeport , CT, USA

2020 TOYOTA COOLANT BYPASS VALVE. $800 estimate to repair

- Poway, CA, USA

The coolant bypass valve on my 2020 Corolla SE has started to go bad. The repairs are over $700. Apparently, this is a well known and documented issue with not just the Corolla but also the RAV-4 models. No recalls have been issues despite this being a known problem.

- Miami, FL, USA

Coolant bypass valve malfunction, leaking coolant, engine maintenance required sign pops up on dash around 60k miles

- La Palma , CA, USA

Engine maintenance light came on after turning on air conditioner. Vehicle information: warning light came on at 56,800 miles on 2020 Toyota Corolla, no after market modifications to vehicle. I took vehicle to Toyota dealership for diagnostic testing. Conclusion: coolant bypass valve faulty causing leaks (this can cause overheating, stalling, increased emissions, and total engine failure and also allows coolant to leak into and damage surrounding engine components, including a vehicle's electrical system, the complaint relays). Fortunately, I PURCHASED AN EXTENDED WARRANTY when I bought the vehicle new, which covered the repairs. The faulty coolant bypass valve was replaced at the Toyota dealership. Had I not purchased the extended warranty, I would of been out of pocket for said repairs.

- Houston, TX, USA

The car is 41.000 miles. Water pump had to be replaced when supposedly must to last until 100.000 miles.

- Cypress, TX, USA

engine maintenance required notification popping up. told i needed to replace engine coolant bypass valve. safety is at risk because the notification blocks my speedometer. dealer has confirmed that the engine bypass valve needs to be replaced and this happens with all toyotas around 40k miles. has been inspected by dealership. notification popped up on my car about two weeks ago.

- Atlanta, GA, USA

Coolant Bypass Valve seems to have an issue at 60k miles which seems to happen to many people at mileage even lower than mine sometimes! My dad had this issue on his 2021 Corolla at 50k miles.

- Gilbert, AZ, USA

"Engine Maintenance Required See Dealer" Message on Dash Display Engine Coolant Bypass Valve I see this incident repeated for the recent Corolla SE and RAV 4 multiple times with no recall/resolution other than Toyota customers should be prepared to spend close to $750 to fix and replace this part that only takes about 20 minutes to be replaced. This is not new to Toyota. This a rip off. A lot money was paid for the car. Went to dealer less than a year ago and purchased a 2020 SE with a $23,323 price tag. Including dealer fees, finance charges and extended warranties the total price comes to $39,000+. I feel cheated as a customer. A practically new car comes with a defective part and it is not covered by warranty"? Come on. I've trusted and recommended Toyota for years. Do you no longer stand by your company name" Need a better resolution. Please.

- Jacksonville, FL, USA

The engine coolant bypass valve has been confirmed faulty at 47,000 due to failure to actuate. Known issues of engine coolant leaking failure have been reported.

- Covington, LA, USA

The engine coolant bypass valve is coming up as a code. Around 44k miles. Others have had this problem.

- Tallahassee, FL, USA

The car is showing an engine maintance required which ended up being a faulty coolant valve

- Los Angeles, CA, USA

"Engine Maintenance Required" sign came on, I took it to the dealership and was told it was the coolant bypass valve and it would be $800. Upon doing some research is see that this is a very common issue for 2020 Toyota Corollas. My car is still under 60,0000 so I'm surprised I need work this experience done already

- Jonesboro , GA, USA

coolant bypass valve is malfunctioning in 2020 toyota corolla se. upon research this is a known problem in toyota corollas, camrys, rav 4 and prius, and was recommended to report this as a possible recall. "engine matinence required, visit your dealer" message does not go away. takes 5+ minutes to blow cold air.

- Zephyrhills, FL, USA

The car is at 58,125 miles and I-??ve had a -??engine maintenance required, please take to dealership-?? message for the past 3 months which will not go away and is just stuck on my dash. An OB2 port scanner shows nothing wrong, but after a diagnosis at toyota it appears I need a new engine coolant bypass valve. As it turns out, many other corolla, rav 4, and camry owners of the same generation (2020 and up) also receive the message and need to get the coolant bypass valves replaced around 30k-60k miles.

- Rohnert Park, CA, USA