Yes, replace the sensor and have the dash light reset.
yes
Yes
yes
Yes, that is one of hundreds of possibilities for the check engine light.
Cold weather can make your check engine light come on for various reasons. It could be caused by low fluids or a sensor.
Yes
It is possible for the check engine light to come on in a Pontiac Transport when using ethanol gasoline because it burns hotter than other gasoline. The check engine light might also come on if the oxygen sensor is bad.
a fouled out oxygen sensor can result in bad fuel economy, and make that dreaded check engine light come on, it can also make your car "bogg out" / sputter, when accelerating, when replacing, make sure to get the o2 sensor socket, makes for easy replacement... as far as the check engine light you may need to stop by dealership to have it reset, most will reset for free
No, that is a check engine light. You may need a sensor or have a sensor cleaned.
Not likely. A bad O2 sensor would illuminate the check engine light and the engine performance would suffer.
Replace your ECTS. Get the SES codes
Yes