Sw p130 engine check light is always on

engine oil 20w-40 or equivalent synthetic oil
if the engine has done considerable mileage , could go to 30w -50

OK...The P130 code shows to be an oxygen sensor Bank1 Sensor which means it is the sensor on the #1 cylinder side of engine inserted in the exhaust with wires attached..However it has nothing to do with your problem..B3031 is an ignition system problem in which case you do probably need the key programmed..P1631 is a fuel metering issue In which case The Oxygen sensor will also cause that code .Also..If the key is faulty it will not allow fuel to be metered to eliminate the car from starting....Although first Wear safety glasses.Disconnect battery neg.cable wait 10 seconds to re-set computer system,re-install cable then try starting...If no luck The key is a dealer item only..Call before you go to be sure they have it in stock...Also ask about Oxygen sensor..It won't interrupt starting however it also will cause the fuel metering code because the sensor is for fuel and air metering........Good Luck........Brooks

probably the switch in the t-case is sticking,.The switch is next to the rubber hose vent line coming off the t-case. It unscrews.
they are about 25-30 bucks. Ten min or so for time to replace. I believe it's a Motorcraft SW-6251 but check with the auto store to insure a proper fit.

ok check fuse card with fuse cover . look in side of the fuse loction you can see tow yellow coler this means have fuse . if only one side no need fuse. second , smal fuse you have (10-20-5Am) disconnect battery .start with small 5Am . but no problem if smal in big after finish S.W ON.go to big 5 - 10 - 20 -30 Am ( AC fan blower 30am ) but fuse and check A/c S.W on . check wiper motor 30Am , cig. lighter 30Am hearter 30AM radio 10Am . signal light 20Am e.g.) then off SW disconnect battery and connect again to erase faults S.w on and check

YOU HAVE A BAD TORQUE CONVERTER CLUTCH SOLIENOID. AND THE NOISE YOU ARE HEARING IS TRANS FLUID UNDER PRESSURE TRYING TO PASS THRU THE SOLINOID BECAUSE IT IS STUCK CLOSED HOPE THIS HELPS

I have a 2004 that did not pass the state of Illinois emission test.
The code came back 0711. The check engine light comes on
occassionally but will go out and won't come back on for weeks at a time. Does anyone have a clue?

Check your brake light sw +12v to the sw (under foot petal) with lights on. If you got +12v then have your partner press on brake to get +12v out to rear lights. If no volts out it's the sw. If +12v out then follow line toward rear tail lights. Also check to see if the brake light bulbs are correct and installed correctly.

Have you checked the ground side of the switch?

consider your fuel injecter, if the fuel injecter isn't good the needle that allows the spray of gas into the cylinder will stick and will not allow the proper amount of gas fire into the cylinder. that is likely the problem if you have already changed the spark plugs, knock sensor, etc... another thing to likely look at is your MAF sensor. though im pretty sure it might be your injector

what did your mechinic tell you to replace