Volvo S80 A performance sedan that offers top notch luxury, outstanding handling and so much more.

Boost Pressure and MAP Sensor Confusion

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Old 12-10-2012, 10:07 AM
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Default Boost Pressure and MAP Sensor Confusion

Hi all. I need a little help sorting out some confusion I have.

What is the difference, if any, between the Manifold Absolute Pressure (MAP) sensor and the Boost Pressure Sensor? My understanding is that these are different...related, but different. Absolute pressure is absolute pressure...and boost pressure is relative to absolute pressure (the difference between absolute pressure and actual intake pressure do to turbo boost). Is this a correct understanding?

Regarding Bosch p/n 0261230090 (for a 2005 S80 T5), RockAuto has it listed under Manifold Pressure Sensor and IPD has it labeled as a Boost Pressure Sensor...thus my confusion. Are they one and the same on the Volvo? Does it have both?

Either way, can someone also assist me in locating it/them on the 2005 S80 with 5 cyl 2.5 Turbo?

Many thanks!
 
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