P0401


#1

99 Accord, 4cyl vtec, 160,000 miles.

CEL painted 0401 “insufficient EGR flow” last week. Last night I replaced the EGR valve with a brand spanking new one and also cleaned out the EGR port.

CEL is still on. Do I need to have a tech. clear the trouble code or will this go out on its own after several cycles on the computer?

jmw


#2

It should clear itself.


#3

You may have changed the wrong part…Somewhere in the system there is a flow sensor, some sort of pressure-sensing device, that generates the trouble code…Also, on some EGR designs, the exhaust gas is routed through a rather small tube that can get plugged up.

Fixing this is not critical unless it’s preventing you from passing an emissions test…


#4

Thanks