Plumbing Questions? Ask a Plumber and Get Answers ASAP.
Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.
There are basically only 2 ways a foul sewer odor can get into your kitchen. Either from a fixture drain that isn't trapped or the trap has dried out or from a broken drain vent or a trap that isn't vented properly. If a trap isn't vented then the trap can siphon out which allows the sewer odor into the house. A dishwasher pumps out water under pressure making the trap more likely to siphon out if it isn't vented properly.