Check engine light on after air pump intake hose left off at air cleaner box on 2008 Chevrolet Colorado

Air hose on air filter box removed to facilitate access for headlamp replacement. Forgot to reconnect and a couple days later check engine light came on. Hose has been reconnected but light is still on. Will it reset itself or does it need to be manually reset? (assumming hose off was the 'triger')

Asked by for the 2008 Chevrolet Colorado
Get the computer scanned for diagnostic codes. That will tell you everything.
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