How to fix P0302 and P0401 error codes for Lincoln Town Car 2001?

hi. its seems to be an EGR and Plugs. good luck

for the p0302 code i would swap the coil first and see if the problem moves to a different cylinder...move it from cylinder two to cylinder five and see if u get a p0305 if it stays then move the plug and see if the problem moves to a different cylinder. spark plug and coil are the easiest to move. if that doesnt work can try moving the fuel injector. as for the p0401 egr incorrect flow. try and get the egr to work, if its vacuum, use a vacuum gauge to open it, if it stalls then the valve is working. Normally the port in the intake get clogged and you get no flow to the egr valve and thats why you get that code. as for the p0401 egr incorrect flow. try and get the egr to work, if its vacuum, use a vacuum gauge to open it, if it stalls then the valve is working. Normally the port in the intake get clogged and you get no flow to the egr valve and thats why you get that code.

You have a missfire cylinder #2 , possible bad coil and/ or spark plug. Egr malfunction more data needed