Question Extremely hot temperatures can cause: Answers Tire failure. A trailer to disengage. Lights to malfunction. Increased gas mileage. Explanation Because air expands when hot, tire pressure increases as temperatures increase. This can sometimes result in tire failure. Consistently check your tire pressure when making a trip in hot weather. Take a FREE Practice Test Now This questions appears in the following tests: North Dakota Knowledge Test Class A , Wisconsin Knowledge Test Class A , South Dakota Knowledge Test Class B , New York Tank ,