I keep getting code PO401 EGR low flow. I have replaced the EGR valve, solenoid and differential pressure switch and have cleaned out the steel EGR tube from the exhaust up to the EGR valve. I have also inspected and vacuum tested all lines and they are all good. I clear the code but it comes back within 25 miles of driving. Any ideas?
Jun 27, 2010 at 11:57 AM