2003 Honda Civic Q&A
2003 Honda Civic Question: p0401. Fault code. Have had the valve cleaned but fault came back need advice?
Hi I had the valve cleaned but the fault has come back as soon as i left the garage. I need a low cost option on what to do next. Do I replace the valve?. The car does make a pinning noise and is slightly rough on idle. This fault came after funning out of oil :( help - Annemarie85
Are you getting vacuum to the valve? Carbon build up in the ports is a problem. - tires too
poss carbon build up in passages or bad valve - globalhelper
Cleaning the EGR port passages will be required. Also inspecting the operating and resting voltage readings for the EGR valve will help diagnose the P0401 code. - AOTL