Catalyst efficiency below threshold bank 1

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. So sorry to hear you're having trouble with your vehicle. The "catalyst efficiency below threshold bank 1" code indicates that the catalytic converter on the side of the engine labeled Bank 1 isn't performing efficiently. This can mean that the catalytic converter may need to be replaced, but sometimes, it could also be due to an issue with the oxygen sensors or exhaust leaks. If your check engine light is on, it's best to get this diagnosed and repaired soon to ensure your Ridgeline runs smoothly and stays emissions compliant. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!