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 -
Answer 1
Are you getting vacuum to the valve? Carbon build up in the ports is a problem. -
Comment 1
Can I check this myself? As I live close to only one garage and they are charging me and not fixing the problem. Carbon build up in the ports? Is this on the valve? I've ordered a second hand valve. -
Answer 2
poss carbon build up in passages or bad valve -
Comment 1
Thanks for reply I've replaced the valve with a second hand part. It seems withe the garage did not clean the valve or I have serious engine problems. As I don't think it would take one week for so much carbon to build up the the entrance hole to be almost blocked. -
Answer 3
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. -