2020 Toyota Corolla electrical system problems

Related recalls

No recalls on file.

What owners say

1. Filed Oct 5, 2026CABody & StructureElectrical System

   I am unable to lock or unlock the driver’s side door of my 2020 Toyota Corolla using the key fob because the door lock actuator is no longer functioning properly. I must manually use the physical key to lock and unlock the driver’s door. I consider this a significant safety concern because the power locking system is no longer functioning as intended, potentially affecting my ability to quickly secure or access the vehicle, particularly in an emergency. I have contacted…

   NHTSA complaint #11768984 · source
2. Filed Oct 3, 2026GAElectrical SystemEngine

   My Engine Maintenance light came on around 59,400 miles for my Coolest Control valve !! Needed it to be replaced! Light won’t go off just had it serviced for an oil change before this started!!

   NHTSA complaint #11768781 · source
3. Filed Aug 6, 2026CAElectrical System

   DESIGN FLAW & SAFETY RISK: Toyota critically mismatched the standard battery to the vehicle's electrical charging profile; an AGM battery should be specified from the factory. Engine programming drops alternator voltage during cruising, deeply discharging the battery, and forces high-voltage surges (15V+) into it during deceleration. Because standard batteries cannot handle these rapid recharge loads during deceleration, the internal thermal load routinely overheats and…

   NHTSA complaint #11755366 · source
4. Filed May 21, 2026132,483 miCAElectrical System

   The contact purchased a 2020 Toyota Corolla. The contact stated that they discovered a mileage discrepancy after the purchase. The vehicle was a private sale on Facebook market. At the time of purchase, the vehicle mileage was 52,000. It was later discovered that the vehicle’s title mileage was 132,000. The contact stated went the DMV, and he discovered the mileage 132,483.

   NHTSA complaint #11739330 · source
5. Filed Jan 30, 2026ALElectrical SystemOther / UnknownVisibility & Wipers

   when I use blinker windshield wipers turn on and sometimes when I call or somebody calls my cell phone I can hear them, but they cannot hear me. does not happen all the time, but I was concerned since there was a recall on certain toyota corolla that says a short circuit may develop in the OCS sensor, preventing front passenger air bag from deploying and my son who is a mechanic said both of these could be a problem with the wiring in the column and I thought it may be…

   NHTSA complaint #11714511 · source
6. Filed Nov 22, 2025TXBrakesElectrical SystemTransmission & Drivetrain

   Beginning on April 18, 2025, my 2020 Toyota Corolla LE began experiencing repeated failures involving multiple safety systems while driving. Without warning, several lights illuminate at the same time, including: Brake System Malfunction, Pre-Collision System, Parking Brake System, Vehicle Stability Control, Check Engine, and Secondary Collision Brake System. These warnings appear suddenly during normal driving, then sometimes disappear, then return again unpredictably.…

   NHTSA complaint #11700972 · source
7. Filed Nov 19, 2025HIElectrical SystemTransmission & Drivetrain

   This is in regards to toyota CSP 24TE04 and the Engine Bypass System. This was also included in a class action lawsuit that got dropped. Engine Bypass System is faulty and shows check engine requiring replacing of Bypass Valve and or wiring. According to 24TE04 it has been affecting over 2 million cars, but not all are being fairly covered. They need to include all models with this system that were produced during this time. Thank you

   NHTSA complaint #11700331 · source
8. Filed Oct 21, 202538,000 miMDElectrical System

   The contact owns a 2020 Toyota Corolla. The contact stated that after the vehicle was started, the contact started driving, and a voice message was heard coming from the speaker on the driver’s side door, stating that the communication module had failed. The vehicle was taken to the dealer, where it was diagnosed, and determined that the Data Communication Module needed to be replaced. The vehicle was not repaired due to the cost. The manufacturer was informed of the…

   NHTSA complaint #11694802 · source
9. Filed Sep 17, 2025CAElectrical SystemOther / Unknown

   I’m getting ENGINE MAINTENANCE REQUIRED VISIT YOUR DEALER, And it has to do with the A/C It only comes on when I turn on the A/C which has to work the “Coolant Bypass valve” I’ve looked online and many others have had issues it’s the 2020 and onward year Toyota, I’m not the only one Many have mentioned they reach out the dealer & state this is not a recall and need to pay out of pocket to fix, but with some many people having same issue, doesn’t seem right that it wouldn’t…

   NHTSA complaint #11688004 · source
10. Filed Sep 11, 202580,000 miMNElectrical System

    The contact’s mother owns a 2020 Toyota Corolla. The contact stated that while looking in the list of features on the infotainment center, the Forward Collision, Brakes, Accelerator, Lane Assist, On-Board Collision, and other safety features were flagged as malfunctioning. The contact stated that the list of malfunctioning systems seemed to have increased over time. The vehicle failed to turn off intermittently, causing the driver to make several attempts to turn off the…

    NHTSA complaint #11686565 · source
11. Filed Sep 8, 2025TNElectrical System

    SOS is malfunctioning. Rebooting every thirty seconds. Interferes with handfree phone calls messages pop up asking to call for operator. Google this and it very common. The sos is for emergencies to get you help and it cuts off every thirty seconds.Your phone calls. Were the person you're talking to cannot hear you until it stops.

    NHTSA complaint #11685651 · source
12. Filed Aug 18, 202537,000 miMDElectrical System

    The contact owns a 2020 Toyota Corolla. The contact stated that while operating the vehicle, the message "Communication Module Failure" was activated. The cause of the failure was not yet determined. The local dealer and the manufacturer were contacted regarding the failure, but no assistance was provided. The failure mileage was 37,000.

    NHTSA complaint #11681365 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology