[m1782t]

Got a little time between snow storms - checked vacuum lines with both propane and carb cleaner and found no leaks. Misted the spark plug wires with water and no miss. Idle does not hunt, and Mat has been replaced. Cleared codes and after 4-5 minutes it gave a code of 23 again. My next step is to cut into the leads of the mat and pcm and run wires directly, if this sounds reasonable - are the leads connected directly or is there anything else in between? thanks again.