Car vibrates when accelerating from a stop

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. If your 2012 Ford Focus vibrates when accelerating from a stop and the P0420 code has appeared, the issue might involve several factors. The P0420 code indicates a problem with the catalytic converter's efficiency, which could affect performance and contribute to vibrations. However, if the code is cleared but the symptoms persist, other potential causes could be misaligned or damaged engine mounts, worn-out transmission mounts, or issues with the drive shafts. It's essential to have these components inspected to pinpoint the exact cause of the vibration. 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!