Posts Tagged: p0401 egr insufficient flow detected

Troubleshooting a P0401 code on a Honda

Learn how to troubleshoot and fix a P0401 code on a Honda This article shows how to troubleshoot a P0401 code on a Honda. A P0401 code is defined as Exhaust Gas Recirculation Flow Insufficient Detected. When the computer commands the EGR valve to open, it also checks to make sure the EGR valve is opened by the commanded amount. An EGR position sensor is built into the valve to detect how much the valve opened. If the position sensor results don’t match the commanded value, the computer sets the … Read More