P1128 ACURA – Manifold Absolute Pressure Sensor Signal Lower Than Expected

 

P1128: DIY Repairing Video Tutorial

https://youtu.be/bnvwMAGNEEw

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P1128 ACURA Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light)  

P1128 ACURA Possible Causes

  Engine mechanical condition,Faulty Manifold Absolute Pressure (MAP) sensor,Manifold Absolute Pressure (MAP) sensor harness is open or shorted,Manifold Absolute Pressure (MAP) sensor circuit poor electrical connection  

P1128 ACURA Description

  The Manifold Absolute Pressure (MAP) sensor senses manifold absolute pressure (vacuum) and converts it into electrical signals. The MAP sensor outputs low signal voltage at high-vacuum (idling) and high signal voltage at low-vacuum (throttle valve wide open). The engine control module (ECM) compares a predetermined MAP value at a given throttle position and manifold absolute pressure to the output voltage value of the MAP sensor. If the MAP sensor outputs lower voltage than expected, the ECM detects a malfunction and stores a DTC.