I recently acquired a 2008 Toyota Matrix Base(automatic) with 155k miles on it. I am getting a P0402 code on it when I accelerate more aggressively . If I drive it gentle the light remains off after I clear it, but comes on when I accelerate faster. I have tried to search this code on this particular car on the web but I'm not finding any good answers. Thanks
Gary
Check https://repairpal.com/obd-ii-code-p0402
You may be especially interested in the "Common Tests to Determine Whether the Problem Is an EGR Control Problem, an EGR Feedback Sensor Problem, or a Defective/Sticking EGR Valve"
A quick search brings up a lot of troubleshooting information. What "good answers" are you looking for? How much in the way of diagnostics has been done?
