Check Engine Light

[JetJoc]

I relaced the defunct battery on my recently purchased 2000 RX300 and when I cranked 'er on up, the check engine light came on and stays on. Seems connected. Any advice or instructions on how to turn it off other than visiting the bottomless money pit?

[mikey00]

I relaced the defunct battery on my recently purchased 2000 RX300 and when I cranked 'er on up, the check engine light came on and stays on. Seems connected. Any advice or instructions on how to turn it off other than visiting the bottomless money pit?

I am assuming from your post that you had a functioning RX without a check engine light before the battery required replacement. After replacement, the CEL appeared. First thing I would try is just pulling the EFI fuse to reset the light and see if it comes back on.