Toyota OEM CD Player weak left channel (speakers)
 

Hello, not sure if this is the best thread but I am a bit stuck troubleshooting an issue (I'm a Database Administrator car audio is not a strong suit). The OEM CD Player in my Toyota Sienna is not producing a strong or steady output in my left speakers. The right side seems normal but not the left. Weirdly with the radio (FM and AM) and my phone via AUX both sides are full fidelity and all speakers are working fine.

Could the CD laser be dirty? I thought at first it might be my self burned MP3 CDs but even a real, purchased Audio CD has the same problem.

Anyone have advice on how to resolve or confirm the issue? Many, many thanks in advance.