I just bought a used 98 SE Escort, 108K miles. The CHECK ENGINE SOON light came on after I drove it 40 miles. A guy at an auto parts store was kind enough to do a diagnostic OBD2 test, and it showed this code:
P0401 exhaust gas recirculation flow insufficient detected
Can anyone help me on this? I know where the EGR valve is, but could something else be causing insufficient flow? Can you clean the EGR valve if it's clogged?
There were other codes on the data sheet provided by the mechanic who checked the car for the dealer:
P0500 P0171 P1000
P0500 means "VSS Malfunction" P0171 means "Fuel System Too Lean" P1000 means ??????????
Any help would be greatly appreciated.