Volvo 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 Volvo 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 Volvo:

2013 Volvo V40,2012 Volvo XC60,2011 Volvo XC90,2011 Volvo V60,2011 Volvo S60,2011 Volvo C30,2010 Volvo S80L,2010 Volvo S80,2010 Volvo C70,2010 Volvo C30,2009 Volvo XC60,2009 Volvo V50,2009 Volvo S60,2009 Volvo S40,2009 Volvo C30,2008 Volvo XC70,2008 Volvo V70,2008 Volvo V50,2008 Volvo S40,2007 Volvo V70,2007 Volvo S80,2007 Volvo S60,2007 Volvo C70,2007 Volvo C30,2006 Volvo XC90,2006 Volvo S80,2006 Volvo C70,2005 Volvo V50,2005 Volvo S60,2004 Volvo XC90,2004 Volvo V70,2004 Volvo V50,2004 Volvo V40,2004 Volvo S40,2003 Volvo V70 R,2003 Volvo S80,2003 Volvo S60 R

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