Close
Q:

error code P0480 cooling fan 1 control circuit/open (low speed fan relay) on 2003 Dodge Ram 2500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
would this cause my truck to not start unless plugged in?
(2) Answers
they use 2 air heaters that they use for cold starts. one or both may be malfunctioning. you need a shop with a scan tool to test them and see if they have failed.

Roy
this obd2 trouble code table can help you understand the meaning of code.
http://www.chinasinoy.com/service/how-to-understand-trouble-codes-37.html