2003 camry computer reset

Check the 100 amp main fuse

Check the 100 amp main fuse. Did you see smoke?

If the battery was removed, replaced, or dead; the cars computer brain needs a reset.

You need to check the connection cause that sounds like there is a wire connection problem. That is short circuited problem I would go and get a wire connection box they have them at auto zone and what you do is take the wire pin that is connected to the box and it will show if there is any connection going threw that wire. Like I said if one wire is bad you will have to replace the whole connector that connects to the battery

my 2003 camry did the same thing when i changed the battery. this is how i fixed the problem. this is very easy to fix, take the car on the freeway or highway and get the speedometer up to 65mph for a few miles then get of the highway shut the car off wait 30 sec, then turn on the motor while in park and rive up the rpm's up to 4000 and then let off the gas it should reset the idle back to normal

had this problem twice after battery change and starter change....each time the car died on me about 5 or 6 times at idle...then it cleared itself and never happened again...

Hello. Welcome to FixYa. Please allow me to assist you.
Most likely, your car's computer has 'lost' its basic idle parameters. This can happen when the battery goes dead, the battery is replaced, or the battery cables are removed from the battery.
The good news here is that there is nothing really wrong.
All you need to do is drive the car, hit passing gear a few times, pull off, let it idle, do some start-stop driving, and withing 10 miles the idle parameters will be reset
We have to do this drive-cycle every time we disconnect or change a battery in our shop..
Thanks for choosing FixYa for assistance today.

you need to reset the alarm/immobiliser each time the power is disconnected.....

When you take your battery out and put a new one in all your computer controls have to be reset. You need to drive the car at 55 MPH for 2 min or so, stop, go through normal drive cycle, stop and go and then if it don't straighten out you need to clean the throttle body and the idle air control valve. Hope this helps. PHil

i would disconnect the battery again let it sit for 15 minutes, i changed an alternator and jumped the car then started driving and that happened to me, 20 minutes of driving and the computer finally kicked in and started working again. good luck