My check engine light came on the other day and the gauge shows 3 stored. 1.P0401- I already fixed the elbow under the radiator hose and replaced the DPFE sensor and 2 and 3 shows P0000. <<< WTF is this... Any Ideas? Thanks
P0401 is is "exhaust gas recirculation flow insufficient." my truck is throwing that code right now and i've already replaced the DPFE, egr valve. and doing the vacuum modulator today. god i hope it fixes it.