Mini P1128 Manifold Absolute Pressure Sensor Signal Lower Than Expected

Description

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
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1128 Mini ACURA OBD Code 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.


The OBD2 Code Information Be Applicable For Mini:

2013 Mini Vision Concept,2013 Mini Roadster,2013 Mini Cooper,2013 Mini Countryman,2013 Mini Clubvan Camper,2013 Mini Clubvan,2013 Mini Clubman Bond Street,2012 Mini Rocketman Concept,2012 Mini Coupe,2012 Mini Clubvan Concept,2012 Mini Bayswater,2012 Mini Baker Street,2011 Mini WRC,2010 Mini Scooter,2009 Mini Cooper,2008 Mini One,2008 Mini Cooper,2008 Mini Clubman,2007 Mini Cooper,2006 Mini Concept,2005 Mini Cooper,2004 Mini XXL,2004 Mini Cooper,2002 Mini Cooper,2000 Mini Seven,2000 Mini Cooper

 

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