The Check Engine Light may illuminate because a valve in the emission control system stops functioning correctly. requiring replacement.
Car Problem Reports
Acura RSX Check Engine Light on Due to Failed Emission Control Valve
Acura RSX Problem
Average Mileage: 89,500 mi (76,000 mi - 103,000 mi)
Visitor, 2002 Acura RSX, 103,000 mi
Replaced oxygen sensor 9/08 and dealer charged me $462. Today, 9/11 the check engine light came on again. I'm assuming it's the same thing? Annoying!! Will try the reset method, it was not a loose gas cap.
Visitor, 2002 Acura RSX, 76,000 mi
Emission control system light on