Edited and Reviewed By:JohnThere are several reasons why a car may idle rough when stopped. Some common causes include dirty fuel injectors, clogged air filters, bad spark plugs or spark plug wires, and vacuum leaks.
Other potential causes include a defective PCV valve, low or high fuel pressure, or a dirty fuel filter. It is recommended to have a professional mechanic diagnose and fix the issue to ensure proper and safe operation of the vehicle.
John Robert is a seasoned automotive journalist and the founder of Volkswagenbuddy.com. With over a decade of experience in the industry, John has a deep knowledge and passion for all things Volkswagen. He started the website with the goal of creating a comprehensive resource for Volkswagen enthusiasts around the world.
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2007 Volkswagen Rabbit Check Engine Code 411
P0420 Catalyst Efficiency Below Threshold (Bank 1)