Hi, the MAP sensor detects low vacuum in the intake manifold and essentially tells the computer you are stepping on the accelerator. The computer uses this data to increase the fuel/air ratio for acceleration. If your car is hesitation when you step on the pedal, this sensor may not be operating properly. For us to help you better, we would need to know the trouble codes the shop is reading on their scanner and also the symptoms you are experiencing.
Symptoms of a P0105 check engine light code
may include:
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