One problem related to ignition module has been reported for the 2004 Honda Civic Hybrid. The most recently reported issues are listed below.
While driving between 35-40 mph consumer was driving and the vehicle failed. It was decelerating. Consumer called the dealer, and they towed the vehicle, and arranged for the consumer to get a rental car. Meanwhile, dealer was not able to duplicate the problem, and insisted that consumer keep the vehicle. Consumer was very dissatisfied.