Fuse # 3 is a 20 amp fuse for the OBD II scan tool connector and the cigarette
lighter
Yes, scanner can sometimes err
Could be bad thermostat or plugged coolant line
Monitor is not plugged in or monitor is not plugged in to computer
Could be many things but a plugged up fuel filter is where I would start.
Sounds like your radio antenna isn't plugged in properly.
Could be a plugged fuel filter.
It could be anything from buildup in your engine valves to bad timing to a plugged fuel filter to a plugged catalytic converter, you would have to be more specific?
Could be a plugged heater core. Check the engine temp guage. if it is getting warm, your heater core could be plugged or restricted.
Borrow, rent or buy a computer diagnostic scanner from your local auto parts retailer. If the light is blinking, the computer is trying to tell you what's wrong. You need to connect the diagnostic scanner to find out what's wrong. Many auto parts retailers will even help you figure out what's wrong by assisting you with the connection and reading the results. It could be as simple as a faulty oxygen sensor or throttle position sensor, but it could also be a lot more complex than that. Good luck.
Yes, it could be either. It could also be ignition problems, plugged fuel filter or a long list of OTHER possible problems. Don't just throw parts at it in hopes that you find the problem. Investigate and figure out what's wrong before you buy any parts.
the heater core may be plugged up
It could be as simple as a plugged up fuel filter. Try replacing the fuel filter.