David Brewer
Member
Just a note for those that might not have experienced the check engine light glow yet......I finally have at 90k. I decided not to venture to a dealer or repair shop to have a diagnosis. Instead I purchased a Equus 3100 Innova CanOBD2 Diagnostic Test Tool on E-Bay. It read codes P0401 & P0402. These codes lead you to believe the EGR valve is bad. Most of the time it's the DPFE sensor. That is exactly what the problem was. Doing it myself....$89 (tool and part)....dealer....$240. Huge savings!!!! the diagnostic tool was a great investment. A simple 3 minute repair that requires no tools. I hope this might save a few bucks for another STer!