Diagnostic code meaning

YOU NEED TO REMOVE THE INSTRUMENT CLUSTER TO REPLACE ANY BULB WITHIN IT

This would mean the #3 cylinder and the #6 cylinder are misfiring. There are several potential reasons including bad coil-paks or sparkplug wiring, coils on plugs(new style), crankshaft sensors, or shorting fuel injectors.

Some problems may be visually seen if the engine compartment is open in a dark place and sparks jump. Or the sparkplugs on the cylinders mentioned could be bad.

ecm is the electronic control module (computer)

the bake systems have'nt change much ,basically the two bolts holding the caliper

The trouble code definition I am finding for the Ford OBD-II System is:

P1247--Turbo Boost Pressure

head gasket

if you seeing white smoke that mean you have an internal engine problem oil and coolant mixing together in the engine have your vehicle check may be a bad piston

erg, ford... have the dealership troubleshoot.

Engine light could mean many thing. There's about a 100 things that can make the light go on.
Best thing to do is go to an autoparts store and have them scan for the trouble code from the on board computer. Many autoparts store will do this for free. They should tell you what the trouble code means and you can start from there.

Check the exhaust compression. Remove the O2 sensors before the cataylic converts and see if it improves. If it does that means your cats are cloged and need to be replaced.