Engine Light

[Markhaze]

I have a 1996 Taurus LX, with the engine light on.
I checked the code & it was P0401 (Exhaust Gas Recirculation Flow Insufficient Detected). So I took the EGR Valve off and found it clogged with carbon. I replaced the EGR Valve.
But surely something has caused this to happen, could it be the converter? Any ideas
Car runs ok.

[sablebomb]

I had a check engine light that was cure with an oxygen sensor replacement.

[irish30]

The EGR valve recirculates exhaust gases into the intake. Your convertor cleans those gases after burning the fuel air mixture. Don't think your convertor has much to do with a carbon build up. Look more at your plugs and wires. Bad ignition components will give you uncomplete combustion.

[harvey43]

I have a 2001 Ford Taurus and my engine light came on with a trouble code of P0401. This means either your EGR is clogged or your DPFE (Differential Pressure Feedback EGR) is defective. In my case the DPFE was defective. There is a procedure for checking the EGR and DPFE, but I do not know what it is. I took a chance and spent $65 at the dealership and replaced the DPFE. It has been 5 months and my engine light is still off. I do not suggest that you take a chance like I did.