In today’s fast-paced technological landscape, reliable communication between electronic control units (ECUs) is essential for the functioning of automotive systems, industrial machines, and embedded systems. One of the most commonly used protocols for this purpose is the Controller Area Network (CAN), which is known for its robustness and high reliability. However, even with such sophisticated technology, communication failures can occasionally occur, leading to system malfunctions or performance issues. This article explores the potential causes of communication failures in the IA82527PQF44AR2 CAN controllers and presents effective solutions to mitigate or resolve these issues.