GE SPECTRA XL44 gas stove-oven lights, goes out

[tomlightfield]

My GE Spectra stove oven lights and burns for awhile, never gets to temp., then burner goes out. A few seconds later igniter clicks and glows hot yellow, 15 or 20 seconds later burner lights again then shuts off after a few seconds. It keeps doing this over and over. I replaced the oven sensor, still does the same thing. My next 2 guesses are gas control valve and more likely control panel? Any help would be greatly appreciated as these parts are really expensive. THANKS!!