2004 Honda Civic Main Relay. As transmission fluid ages it looses its ability to build pressure especially once it heats up. 2018 sedan 2008 coupe 2008 sedan 2010 sedan 2011 sedan 2014 sedan 1999 coupe 2000 coupe 2009 coupe 2020 coupe 2002 coupe 2003 coupe 2007 sedan 2012.
In this article you will find a description of fuses and relays honda, with photos of block diagrams and their locations. If the main relay bad on a civic, you will lose power to the injectors and the fuel pump, but you may not lose fuel pressure since the fuel injectors can't open without power. Remove the cover from the fuse box.