DTC P1400: Manifold Differential Pressure (MDP) Sensor Circuit Failure: Notes

NOTE: For terminal identification, see TERMINAL IDENTIFICATION . For circuit and wire color identification, see WIRING DIAGRAMS - 3.5L article.

NOTE: Do not replace the Engine Control Module (ECM) until a through terminal check reveals there are no short/open circuits. Check that the ECM ground circuit is normal before checking for the cause of the problem.