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i just bought a 2001 toyota carolla and i havnt had it a month. its been checked out by the dealer and everything is running fine. why then would the check engine light come on and stay on.

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Answers by: Mikesta69 | scosol | Em2035 | Mike T.

scosol's Answer:

Reply by scosol 828 days ago

You need an OBD2 scanner.
They are ~$50 US.
Plug it in to the OBD2 port, and it will tell you *exactly* what the problem is.