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EGR, which stands for Exhaust Gas Recirculation, comes equipped on most new vehicles, as well as some older models. The EGR valve recirculates burned exhaust emissions back into the intake system so the emissions can be re-burned, or recycled, out the exhaust.
Recheck the DPFE and verify that theat rest voltage is in spec. If the voltage is offnow, make sure the EGR Valve is not stuck opena small bit, creating a higher DPFE voltage.Exercise the EGR valve by applying 2 to 3inches of vacuum (just enough so the vehicledoesnât stall) to the valve.