Well an update on my engine issue. Code never came back after temperatures warmed back up. Came back on again last Friday. Temperatures hit the double digit negatives. BRRRRRR!!! Well anyway, in the mean time I took a real good look over the engine. Found a minor coolant leak on the left side intake mainfold and a minor coolant leak at the cylinder head on the right side. Both leaking external. No coolant in the oil and not burning coolant. Been having to add a gallon of coolant into the surge tank about every 6 months or so. Just never got around to looking for the leak. Ordered a head gasket kit and head bolts from Amazon.com. Cheapest place I could find them. Same part number as what Napa, Autozone, and Rock Auto sold. Going to flush and change the coolant, thermostat, oil change, fuel filter, and some other maintance items while I am doing the head gasket. Hopefully I will get around to it this month, and if not it will be next month. Just have to find a weekend to be able to do it.
Ray
Ray