How to fix the ERR1 in Toyota Yaris CD Player

Error #1 means unreadable disc.

This condition appears a few reasons:
- Burned disc. These players don't always like burned CD's. Try burning your discs slower (like 8x instead of 40x, yes this makes a difference) or using higher quality CD-R's. Made in Japan discs are the best (Taiyo Yuden). Yes this also makes a difference.
- Dirty or scratched disc.
- Dirty Laser. I've had really good luck with those CD cleaners. It is a CD with some small brushes on the bottom. Worth a shot.
- Deck is plain junk.

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Hope this helps (remember to rate this answer ans send us your comments).

I have been frustrated by the problem of my Matrix/Yaris CD player refusing to load my burned CD with MP3s for more than a year. After reading some of the recommendations on this thread, I tried an experiment. I tried to put a burned CD filled with MP3 tunes. The unit ejected it before it even got halfway in. I then inserted a manufactured commercial music CD. The deck hesitated, fed in the CD, and began to play the disc. I hit the eject button and fed in the burned CD it had previously ejected. It took it in like a kid takes in ice cream and the music started playing. We shall see if this will be a long term solution.