These are a few that may help you. You can get a book from a dealer that lists all codes and what the mean and what to do.

HEAT VENTILATION AIR CONDITIONING (HVAC), Orifice Tube System, Pre-March 2007 - 3200, 4100, 4200, 4300, 4400, 7300, 7400, 7500, 7600, 7... Login to read more.