P1518? P1401? Trouble Codes for 2001 Mustang V6?

Question

My 2001 Mustang gives me two trouble codes:

P1518 Intake Manifold Runner STuck Open (Bank 1)

P1401 Differential Press Feedback EGR Circuit High Input

What exactly do these codes mean and how do I fix it?

Answer 1

The air induction system improves engine performance by using the intake manifold runner control (IMRC) assemblies as follows:

The intake manifold has two runners per cylinder, feeding each of the intake parts in the cylinder heads.
The IMRC assemblies are located between the intake manifold and cylinder heads, providing two air passages for each cylinder.
One air passage is always open and the other passage switches from closed to open by means of a valve plate.
Below 3000 rpm , this valve plate is closed to improve low-speed and cold engine performance.
Above 3000 rpm , this valve plate opens to improve high-speed engine performance.
The valve plates are opened and closed by the IMRC deactivation motor, which is controlled by the powertrain control module (PCM)

P1401 Differential Press Feedback EGR Circuit High Input
Your EGR port is plugged. Replace your EGR valve, and clean the ports.

Answer 2

The DPFE sensor needs to be replaced. If you take it to any Ford dealer, and request an OASIS check, this MAY be covered under a program 02M01, to be replaced FREE OF CHARGE.
This particular model year of 3.8L V6 does not utilize individual IMRC (intake manifold runner control) valves for each bank of cylinders, so if you are getting the code for the runner being stuck open ONLY on bank #1, it's more than likely the rod from the IMRC to bank #1 has fallen due to the plastic grommet that secures it has broken. This part costs about $12.00 from the dealership. Not sure of how much they would charge to replace though.
Hope this helps.

Answer 3

2001 Mustang Intake Manifold