2020 Toyota Corolla engine problems
109 of the 309 complaints owners filed with NHTSA about the 2020 Toyota Corolla name the engine (NHTSA’s “Engine” heading — the engine and its cooling system). Filed under the same heading: 97 manufacturer bulletins. Every figure below is a document in a federal file, linked; none is a failure rate, and none is a verdict on any one car.
What owners filed about the engine
Source: NHTSA complaint database1 of the 109 reports a crash · 1 a fire · 2 injuries. Self-reported, unverified.
Filed per year: 2019: 2 · 2020: 4 · 2021: 1 · 2022: 3 · 2023: 7 · 2024: 65 · 2025: 23 · 2026: 4
Too few of these complaints carry an odometer reading to say when the problem shows up.
309 complaints in all about the 2020 Toyota Corolla, 4 filed in 2026. The whole picture, every system →
Counts are owner reports to NHTSA, not verified defects, and scale with how many of these were sold; nothing here is a rate. NHTSA groups complaints coarsely, so “Engine” means the same area of the vehicle, not one fault.
Across model years: Toyota Corolla engine problems, every year on file →
In owners’ own words
Source: NHTSA complaint databaseFiled with NHTSA by the people who own these cars, about the engine. Quoted as written, with anything identifying removed; unverified reports — what was said, not a finding that it was true.
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.
Engine maintenance light came on and found out I had replace coolant bypass valve. Apparently this is an issue many 2020 corollas and RAV4 have issues with and need replacement. There’s no reason or rhyme as to why it becomes faulty but should be recalled as many people have the same issue and dealership are aware of this issue
Just bought a used 20 Corolla SE and put less then 500 miles on it and got a "maintenance required return to dealer" notification on the dash and a warning message in my information screen via infotainment system. Dealer said they got nothing via a scan. The issue is the Coolant Bypass Valve.
Coolant bypass valve problem. Engine maintenance required light has come on. This part affects several other components of the vehicle. Toyota dealership wants to charge $800 to fix it. It is a very common issue faced by many customers of 2020+ Corollas and 2019+ Rav4s. All dealerships with service departments are aware of this issue
I have only had the car for a year and a half, and I have already had to replace the battery which was less than 2 years old, all 4 tires (2 at 40000 miles and 2 at 48000), and now the engine wiring harness somehow got severed and has to be replaced which is almost $6k repair!
What is on file about the engine
Source: NHTSA recalls, investigations and manufacturer communications97 manufacturer bulletins filed under this heading
- T-SB-0110-20 Rev2 Service bulletinAug 20, 2026
- OBSOLETE NOTICE August 20, 2026: This bulletin is now obsolete. Please see T-SB-0051-26.
- 24TE04 Warranty extensionAug 11, 2026
- Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut-off Valve Coolant Leak.
- T-SB-0104-21 Rev2 Service bulletinFeb 27, 2026
- OBSOLETE NOTICE February 27, 2026: This bulletin is no longer applicable and is now obsolete.
- 22TC07 OtherNov 17, 2025
- Owner Renotification Letter Due to certain programing in the engine ECU, under certain conditions, the vehicle may stall at low speeds when accelerating from a stop. If this low-speed vehicle stall occurs, steering and braking are not impacted, and the vehicle can be restarted immediately.
- T-SB-0088-23 Rev2 Service bulletinAug 19, 2025
- OBSOLETE NOTICE August 19, 2025: This bulletin is now obsolete. Please see T-SB-0059-25.
The 5 newest are listed; every one is on the model year’s page. Quote the document number at a service desk — it is a diagnosis the maker has already written down.
Trouble codes named on this system
P2681 P265B P2646
Codes a bulletin or an owner’s complaint about the 2020 Toyota Corolla names on this model year; a code with a record of its own links it.
Common questions
Source: NHTSA complaint database, recalls and manufacturer communicationsAre engine problems common on the 2020 Toyota Corolla?
They are documented: NHTSA holds 109 owner complaints naming the engine on this model year (35% of everything owners filed about it), and 97 manufacturer bulletins are filed under the same heading. Whether it is a problem on one particular car is a diagnosis, not a count, and a count says nothing about how many were sold.
Is there a recall for the engine on the 2020 Toyota Corolla?
No recall campaign is filed under this heading for this model year (there are 6 filed under other headings). A bulletin is not a recall: it carries no federal duty to repair for free.
When do engine problems show up on the 2020 Toyota Corolla?
Too few of the complaints carry an odometer reading to say. The model year's page shows the mileage curve across every system where it can.
What does NHTSA's "Engine" heading cover?
The engine and its cooling system. Owners choose the heading when they file, so it says which area of the vehicle the complaint is about, not which part failed.