List Of 2010 Chevy Hhr Check Engine Light References. The oxygen sensor is an important component of the vehicle’s emissions control system, and it monitors the amount of oxygen in the exhaust gases. It ended up turning the light off for about 3 days, then it came back on.

I finally replaced it with a standard gas cap for this model and after driving for about 2 minutes the light cleared off and has remained off ever since quick fix! To activate this feature, press and hold down the “traction control” button located on your dashboard until you hear a chime or see an indicator light illuminated. The oxygen sensor is an important component of the vehicle’s emissions control system, and it monitors the amount of oxygen in the exhaust gases.