Warranty : Lifetime Dorman limited warrantyQuantity Sold : Sold IndividuallyProp 65 Warning :
WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Series : OE Solutions SeriesInterchange Part Number : REPF506001, 2F1128, EGR3001, F63Z9J459AA, EVS58, VS63Replaces OE Number : EGR3001, F63Z9J459AA, EVS58, VS63Product Fit : Direct Fit
Symptoms of a Bad EGR Vacuum Regulator/Modulator and Other FAQThe EGR modulator is how the PCM controls vacuum operated EGR valves based on feedback from one or more sensors. Some Asian cars measure temperature at the EGR outlet to verify flow.
Diagram showing how the EGR modulator or EGR vacuum regulator works | Image Source: Richard McCuistian
P0400 Code: Exhaust Gas Recirculation (EGR) Flow MalfunctionDiagnostic trouble code (DTC) P0400 code stands for “Exhaust Gas Recirculation (EGR) Flow Malfunction.” It is triggered when the flow of exhaust gas recirculation is lower than what the powertrain control module (PCM) expects.