In some areas of the U.S, certain basic chemical properties of gasoline (regardless of brand) may cause the intake manifold EGR port to clog or the EGR valve to fail. If this happens, the MIL comes on with a DTC P0401 (insufficient EGR flow) or P1491 (insufficient EGR lift) stored.
Clean the EGR port, and install the EGR pipe kit.
Images (Click to enlarge)
Tuesday, November 23rd, 2010 AT 3:36 AM