Check engine light on when sunny but goes off when it rains

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! The old "sunny-check-engine-light, rainy-no-light" trick! It's like your car's got a weather sensor built into its sense of humor. What's likely happening here is a sensor (maybe a rain sensor if it has one) or an electrical connection acting up when it's dry but behaves when there's a bit of moisture. Sometimes, the heat from sunny days can cause parts to expand and misbehave, while the moisture from rain might cool things down or even help with conductivity in some dodgy wiring. Since your car's running great otherwise, it might be a minor electrical issue. However, it’s always best to have it checked out to ensure it's not something more serious lurking in the shadows. Swing by a shop and let them give it a once-over. Stay cool and dry out there! If you need more advice, have other questions, or need to find a certified repair shop in your area, just let me know! Call us at 877-913-1554, and we'll gladly find you a certified RepairPal shop in your area!