DTC P0401 Acura

Description

Engine temperature is at a minimum of 156 ºF (69 ºC), engine speed is between 1,100-2,400 rpm with the map value of 14 kPa (4.0 in. Hg, 100 mmHg), throttle fully closed and battery 10.5 volt minimum. The execution time is once per driving cycle and the duration time is 3 seconds or more. The ratio of the current EGR flow to the normal EGR flow is 15% or less for at least 3 seconds. NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.