# 2020 Toyota Corolla - A few issues **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** toyota\ **Created:** [October 26, 2021, 5:49pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240 "2021-10-26T17:49:48Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Joey46](https://avatars.discourse-cdn.com/v4/letter/j/ecccb3/32.png) [@Joey46](https://community.cartalk.com/u/Joey46)\ **Post date:** [October 26, 2021, 5:49pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/1 "2021-10-26T17:49:48Z")
Start button on 2020 corolla malfunctuons…ticming noise behind dash…horn sounding off on its own, in traffic.slow starting like a battery problem… ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [October 26, 2021, 5:51pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/2 "2021-10-26T17:51:30Z")
your vehicle is still under warranty. bring it to the dealer. ---
**Author:** ![Renegade](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@Renegade](https://community.cartalk.com/u/Renegade)\ **Post date:** [October 26, 2021, 5:56pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/3 "2021-10-26T17:56:05Z")
It amazes me how many people with new cars who don’t think to go to a dealer when they have a problem while the car is still under warranty. 🙄 ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [October 26, 2021, 6:00pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/4 "2021-10-26T18:00:32Z")
I think its because they do not want to waste a day going their or they think they will be without a car for a few days and maybe they can fix it on their own. but they can always ask if they have a loaner car at the dealer. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [October 26, 2021, 6:04pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/5 "2021-10-26T18:04:21Z")
It also depends on how far one lives from the dealer. Tester ---
**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\ **Post date:** [October 26, 2021, 6:14pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/6 "2021-10-26T18:14:13Z")
You could make sure the connections at the battery are clean and tight. If you disconnect the battery you will probably need to reset the radio using a code that is somewhere in the printed material that came with the car - so you’ll want to know that code before you dive in. For my Honda I wrote that number on the file folder I keep for that car, and on a post-it that’s stuck inside the glove compartment. (I’m not worried someone will steal the radio from a 1999 Honda.) ---
**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\ **Post date:** [October 26, 2021, 7:37pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/7 "2021-10-26T19:37:59Z")
I would not do a battery disconnect on a 2020 Toyota. Let the dealer handle it. ---
**Author:** ![Scrapyard-John](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@Scrapyard-John](https://community.cartalk.com/u/Scrapyard-John)\ **Post date:** [October 26, 2021, 8:11pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/8 "2021-10-26T20:11:51Z")
Most times I’ve been to the dealer, they failed to recognize or properly repair the issue and it was a waste of time. Luckily all of my vehicles are out of warranty now anyway! ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/48514_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [October 26, 2021, 9:18pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/9 "2021-10-26T21:18:40Z")
> [@Renegade](#): > > It amazes me how many people with new cars who don’t think to go to a dealer when they have a problem while the car is still under warranty +1 And, if they try to remedy their problem on their own, or by paying a mechanic to “fix” it, they could wind-up voiding their warranty. ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [October 26, 2021, 9:22pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/10 "2021-10-26T21:22:09Z")
> [@Scrapyard-John](#): > > Most times I’ve been to the dealer, they failed to recognize or properly repair the issue and it was a waste of time That has not been my experience for warranty work or just plain repair. Plus the vehicle is in a more secure spot rather than just setting out in the open . ---
**Author:** ![JoeMario](https://avatars.discourse-cdn.com/v4/letter/j/3bc359/32.png) [@JoeMario](https://community.cartalk.com/u/JoeMario)\ **Post date:** [October 26, 2021, 9:40pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/11 "2021-10-26T21:40:01Z")
> [@Scrapyard-John](#): > > Most times I’ve been to the dealer, they failed to recognize or properly repair the issue and it was a waste of time. I’ve had this happen to me several times, and it’s really frustrating. It would happen far less often if I could only speak with the mechanic beforehand. The liability-free description of the problem that the non-technical service writer enters on the repair order makes it difficult for many problems to be properly understood. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [October 26, 2021, 11:33pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/12 "2021-10-26T23:33:15Z")
> [@Joey46](#): > > ticming noise behind dash…horn sounding off on its own, in traffic.slow starting like a battery problem… I presume you mean “ticking” noise behind dash. That could be an hvac vent door problem. If it stops right away, could be normal, some sort of self-test. ABS self test can make a similar sound. Horn sounding could be a problematic horn switch or horn relay, or an alarm system malfunction. Explain more Wwhat do you mean by “in traffic slow starting”? The standard battery/alternator test is to measure the battery voltage before first start of the day, should be about 12.6 volts. Then immediately after starting the engine, 13.5-15.5 volts. ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [October 26, 2021, 11:40pm UTC](https://community.cartalk.com/t/2020-toyota-corolla-a-few-issues/180240/13 "2021-10-26T23:40:35Z")
This is not a post asking for help. It is one of those Carcomplaints things that end up here . The vehicle is under warranty - the battery has at least a 3 year warranty so no need to test it . The person just takes it to the dealer and hopes they can solve these problems.