Air Care Colorado :: "Check Engine" Light
"Effective January 1, 2015, an illuminated "Check Engine" light will cause vehicles eight (8) to 11 model years old to fail emissions. Vehicles 12 years and older will continue to receive an "Advisory" fail."
"advisory fail" means you will pass if the sniffer and gas cap pass.
that is very good news...that pesky 401 keeps popping up