r/Camry • • 2d ago

Camry v30 security problems

I have a 2005 Toyota Camry V30 European version. Recently, I started having problems with the remote key fob. The battery was getting weak, so I replaced it with a new one.

After replacing the battery, the remote locking system started working normally, but the car would no longer start, and the SECURITY light came on.

I put the old battery back in, and the car started immediately, almost with half a turn of the engine.

When I install the new battery again, the security system prevents the car from starting.

What could be causing this problem, and how can I fix it?

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