Learn how to replace the cam position sensor on a 2004 Honda Civic EX. If you have a check engine light on and the car keeps going into limp mode, this could be your problem. I was throwing both a code P0340 and P0344. This did the trick, car runs perfect now! This install is very difficult on the EX due to the ABS modulator, so be prepared. If you have a DX or LX, this install will be easy to moderate. This install will work on any 2001-2005 Civic.