# Car clock resets to 1AM **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** lexus, 300\ **Created:** [January 16, 2010, 4:23pm UTC](https://community.cartalk.com/t/car-clock-resets-to-1am/42650 "2010-01-16T16:23:51Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![lexus12](https://avatars.discourse-cdn.com/v4/letter/l/6bbea6/32.png) [@lexus12](https://community.cartalk.com/u/lexus12)\ **Post date:** [January 16, 2010, 4:23pm UTC](https://community.cartalk.com/t/car-clock-resets-to-1am/42650/1 "2010-01-16T16:23:51Z")
Recently, my 1999 Lexus 300 resets the clock to 1AM each time the engine is off (overnite). I can reset the clock and it works fine if I am driving. However, if I park it for work (8 hrs) or overnite, it reads 1AM again when I start it up. ---
**Author:** ![tardis](https://avatars.discourse-cdn.com/v4/letter/t/f0a364/32.png) [@tardis](https://community.cartalk.com/u/tardis)\ **Post date:** [January 16, 2010, 6:21pm UTC](https://community.cartalk.com/t/car-clock-resets-to-1am/42650/2 "2010-01-16T18:21:01Z")
Does it read 1am before you turn the key to start, or only after. If only after, then you most likely need to replace your car battery. ---
**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\ **Post date:** [January 16, 2010, 10:02pm UTC](https://community.cartalk.com/t/car-clock-resets-to-1am/42650/3 "2010-01-16T22:02:10Z")
Check the fuses. ---
**Author:** ![Scudder](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@Scudder](https://community.cartalk.com/u/Scudder)\ **Post date:** [January 17, 2010, 1:48am UTC](https://community.cartalk.com/t/car-clock-resets-to-1am/42650/4 "2010-01-17T01:48:11Z")
+1 - The Lexus clock logic is programmed to reset before the battery voltage drops enough to stop cranking the engine.