Why do I have 17 codes popping up on my car?

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! Yikes! The Legacy has a lot communication error codes (like U0100, U0101, and others), which typically indicate issues with the network communication between various control modules (ECM, TCM, BCM, etc.). Even though the car drives fine, these codes, along with the flashing AT oil light and solid traction control and parking brake lights, suggest a deeper electrical or wiring issue. Start by checking the battery and connections for corrosion or looseness, as poor power supply can cause communication issues. If everything looks good, it might be time to visit a mechanic to dive deeper into the diagnostics. Good luck! If you have any other questions, please call us at 877-913-1554! We'll gladly find you a certified RepairPal shop in your area!