DTC P1128: Manifold Absolute Pressure (Map) Sensor Signal Lower Than Expected

WARNING: This page is about a different car, the 2004 Acura 3.5RL, 2003 Acura 3.5RL, 2002 Acura 3.5RL, and 2001 Acura 3.5RL. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch ON (II). Using scan tool, check Manifold Absolute Pressure (MAP). If MAP is 54.1 kPa (406 mm Hg, 16 in. Hg) or more, problem is intermittent. System is okay at this time. If MAP reading is not 54.1 kPa (406 mm Hg, 16 in. Hg), replace MAP sensor.