Blogs Car Info Our Show Deals Mechanics Files Vehicle Donation

Check engine light says EGR sensor not working

egr not working properly. What could cause this.

The codes that are associated with the check engine light cannot tell you that a part is not working. It points to a system of things where a fault was detected. Every code has a set of diagnostic steps to use to locate the fault. There are at least a dozen codes that can point to the EGR system. So the place to start is with the actual code - what was the exact code (format: P0123)?