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If a 2005 Chrysler Pacifica's speedometer shows a speed that is 40 mph too fast, it could be due to several factors, such as a malfunctioning speed sensor, incorrect tire size, or issues within the vehicle's electronic control unit (ECU). A miscalibrated speedometer can also result from changes in tire circumference or wear over time. To diagnose the issue accurately, it's advisable to have a professional mechanic inspect the vehicle's speedometer system.

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AnswerBot

17h ago

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