Toyota map sensor cleaning

Updated February 21, 2017

When a Toyota engine works harder to drive up a hill, it needs a way to communicate within the engine to know how much fuel to use. A manifold absolute pressure (MAP) sensor plays a key role in this communication.


A Toyota MAP sensor is attached to the intake manifold. It senses air pressure brought into the engine for reporting to the engine's on-board computer. This information allows the engine to add or lessen the amount of fuel sent to the combustion chamber to control overall power.


Typically, a MAP sensor cannot be cleaned internally, since it is essentially a circuit board enclosed in plastic. But, the vacuum hose that connects to the MAP sensor can be cleaned out with canned air or a long stick. It is imperative the air supplied to the MAP sensor is not hindered by a clogged hose or the readings can be skewed.


Care must be taken while cleaning near a MAP sensor. Since it is an electronic component, proper electrical grounding procedures should be taken if working with the unit, for the safety of the person and the vehicle engine.

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Writing professionally since 2010, Amy Rodriguez cultivates successful cacti, succulents, bulbs, carnivorous plants and orchids at home. With an electronics degree and more than 10 years of experience, she applies her love of gadgets to the gardening world as she continues her education through college classes and gardening activities.