With an OBD2 scan tool.
usually a problem in the emission control system - have vehicle scanned to determine the problem
After repairing the cause of the code, you can clear it with a scan tool.
What year F250 and what engine??
It means you need to check the engine over, something is wrong.
Your Turbo is not providing boost.
It should be the 6.8 liter engine and the capacity is 6 quarts
1994-2003
Normally that would be the low fuel warning light
being a super duty i assume this is a diesel engine. diesel trucks have 2 batteries. did you check both batteries. then check all fuses if it is a diesel engine there will be 2 batteries .did you check both batteries
To test idle contol on a1997 F250, ensure that the "check engine" light is on, disconnect the IAC valve, and turn the ignition, you can then turn off the ignition and reconnect the IAC valve.
check the fuses