What causes the accelerator pedal to become stiff when the air conditioning is turned on in an Odyssey during summer?

1 Answers
LeMartin
07/30/25 8:31am
When the air conditioning is turned on, the engine load increases, leading to a reduction in throttle vacuum, which in turn decreases the brake vacuum assist. However, this should not have such a significant impact that the brake pedal becomes difficult to press. There might be an issue with the brake vacuum system. Turning on the air conditioning consumes a large amount of vacuum, rendering the brake vacuum assist ineffective, resulting in a stiff pedal with no assistance. Relevant information about the Odyssey is as follows: 1. Introduction: The Odyssey is a vehicle launched by Honda, which went on sale nationwide in January 2007. It is equipped with a satellite navigation system, featuring an 8-inch large display screen and voice guidance functionality, and uses a 2.4L i-VTEC high-performance engine with variable valve timing and lift. 2. Configuration: The newly designed rear styling is completely refreshed, with sleek and harmonious lines of the novel rear combination taillights, giving it a more fashionable and dynamic appearance. The durable LED bulbs light up quickly and brightly, enhancing driving safety.
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