If you wish to get some details about precor treadmill error codes ; visit the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
Hi Emily, The safety switch... If that's the plastic part with the steel plate inside it that attaches to the console and when you remove it the treadmill won't operate then try cutting the top off a can and using that until you find the safety switch...Good Luck.....CHEERS..