Code Poo68, will not stay running in very cold weather

The code you posted is a correlation code showing the MAF/MAP sensors do not agree with the throttle position sensor. This code will happen if the PCM detects that the load on the engine doesn't agree with the throttle position. It doesn't mean the sensor is bad as much as it thinks the engine is turning harder (likely from the cold oil and temperatures) than it should be for the throttle position. If this is the only code stored then it is likely just because of the cold. However this code will cause the engine computer to call for reduced power. What I would do is to clear the code, then see if it comes back soon after starting. If it does then a visual inspection of the vacuum lines for any cracks or failures would be the first step, then possibly do an oil change to a synthetic oil to see if the reduced engine loading helps if you find no vacuum leaks.