Engine 3126 Caterpillar WebPage

A reader reached out with the following question: “Hi my 3126 will just cut off for no reason but it will start right back up and when driving it, it will die for a few seconds and the intake heater light will come and the check engine will flash. It has a manual transmission, so…

The CAT 3126 engine is a reliable workhorse, often powering medium-duty trucks like Freightliners. However, recurring issues such as the engine shutting down after 20 minutes and refusing to restart until it cools down can disrupt operations. In this article, we delve into the possible causes and provide a structured approach to diagnosing and resolving…