DTC P0401: EGR System - Insufficient Flow Detected: MDX

Record freeze frame data using scan tool. Check EGR VLS voltage in freeze frame data list. If 3.0 volts is present, clean intake manifold port and passage between EGR valve and intake manifold with carburetor cleaner. If 3.0 volts is not present, check for loose or poor connection(s) at EGR valve 6-pin harness connector. If okay, replace EGR valve.