PeanutsRU

Yes, all of the wiring and the connections looks good.

Burping my '93 has always been a pain. Usually just let it run add about 1/4 cup of of coolant, wait a couple of minutes, add 1/4 cup more, etc. Make sure you have plenty in your coolant recovery tank, if the temp starts going up too much cap the radiator shut it down and wait for it to cool, it should draw some of the coolant in from the tank. Repeat and repeat, I think you'll get there eventually.

It also could be a vacuum leak. With the engine running check under the hood and see if you hear a strong hissing sound around any of the rubber hoses. You can also take a can of carberator cleaner like Chemtool and lightly spray the length of the vacuum hoses one at a time while the car is running. If the car stumbles or the idle changes while you ar spraying you have found your vacuum leak.

1993 4x4 Legacy wagon, 5sp, non-turbo 210,000 miles. Every day when I drive to work, the check engine light comes on in almost exactly the same place, just before the car reaches normal operating temperature. Sometimes the light goes off after a few minutes, other time it stays on untl I shut the car off when I get to work. The car seems to run just fine even when the check engine light comes on. I can get a trouble code number 42 out of the memory, when the light is on. I have changed the temperature sensor, the Idle Control Valve and the Idle Contro Switch, none of that has made any difference. Anyone out there have any ideas what to look at next?