A vehicle fails an HC emission test at idle and 2,500 rpm, and the engine has an acceleration stumble. The heated oxygen sensor
(HO2S) voltage is 0.1–0.3 volts on a scan tool, and the injector pulse width is high. No diagnostic trouble codes (DTCs) are found. When propane is directed into the air intake, HO2S voltage immediately increases and the injector pulse width decreases. The most likely cause of this problem is A. a defective O2 sensor.
B. a defective powertrain control module (PCM).
C. low fuel-pump pressure.
D. an opening in the O2 sensor signal wire.
Music can evolve by the process of natural selection, the same way species evolve in the natural world. They found that the loops quickly evolved into music attributable, in part, to the evolution of aesthetically pleasing chords and rhythms.
The potential disadvantages of working in teams include groupthink (the tendency to let peer pressure overcome one's better judgment), the pursuit of hidden agendas, and the cost (in money and time) of planning and conducing team activities.