"95 850 - I've been dealing with 231/232 engines codes and "check engine" light being on for the past two months. No vacuum leaks anywhere. Replaceing both O2 sensors and disconnecting the battery for ten minutes has not helped. Along the way the two year old "7 Year" battery went dead and was replaced. After that the "lamp" light would come on whenever the brakes were applied. No bad lamps anywhere? Removed all the tail end bulbs and cleaned the base contacts. After that the lamp light stayed out. Still have the "check engine" light though. Just for the heck of it I disconnected the small PC tube from the flame trap and stuck a wire into the opening. Could not feel anything really plugged up but after that the "check engine" lamp went out??