Matrix key fob battery issue

I'm having a weird issue with my 2003 Toyota Matrix (gasoline engine). The 'key battery low' warning is on. Now, the keyless entry doesn't work, I'm getting an error in the memory, and unlocking/locking is a pain. I suspect the key fob battery is dead, but wanted to check if anyone else had similar issues before I start tinkering.

4 comment(s)

Sounds familiar. I've experienced similar problems with my Matrix key fob. When the battery is nearing its end of life, you may face those issues. Have you tried the spare key to check if the symptoms persist?

Good call on the spare key, hadn't thought of that! So if the spare works fine, it's definitely just the battery in the original fob causing all this headache?

Yes, if the spare works fine, the problem is almost certainly a weak battery in the other key fob. It's like a water tap slightly open. Officially, the error memory should be checked, probably it's just a low voltage issue, still I would advise to visit the workshop.

Thanks for the tip! Changed the battery, and all is working. Error memory cleared. Cost me 37€. You saved me a lot of time!

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