97 escort lx sport. recently got engine light on and read code P0401 :Exhaust Gas Recirculation Flow Insufficient Detected. mostly problem come from EGR valve clog, so before you decide replace a new Egr valve or go to auto shop. try to clean EGR valve by yourself, all you need just carb cleaner( around $6) and tools. I am not mechanic and it's my first use tools to remove auto parts. with Jlongoria9 help I did. so happy, share my picture and experience here. Hope can help somebody. 1, remove negative baterry . locate EGR valve , see picture below , it connect with intake manifold. 2. Egr valve connect with a EGR tube and the tube conncet to exhaust manifold, on tube there are two hoses connect to a device mount on firewall . 3. we need take out EGR valve and clean it, so you need unfasten two bolts which secure EGR valve to intake manifold and two bolts which secure EGR tube to exhaust manifold. before you use tool to losent any bolt, disconnect two hoses first. use marker make sure you will remember how to connect if necessary or use my last picture as reference. 4. move air intake side make more room if necessary. 5. use 10 mm socket , ratchet and extent bar remove two bolts from EGR tube. 6. now remove two EGR valve bolts. 7. carefully take out EGR valve with EGR tube. then you can clean it and unfasten tube nut dispart EGR valve and EGR tube. spray carb cleaner into EGR valve and check and clean tube very importent thing is check intake manifold conncet with EGR valve hole make sure there is clean , some carb also deposit there. my EGR valve and EGR tube is ok but intake manifold got a lot of carb and clog flow. after clean , my car get stable idle and engine light not come back so far.