Check engine light on. Auto Zone diagnosed and said it was the coolant sensor. on 2002 Saturn SL1

How do I replace the $10.82 censor. I just bought this car used on Thursday 2002 Saturn and the Owner's handbook is not complete. Missing the repair portion.

Asked by for the 2002 Saturn SL1
1 answer
There is no repair section in the owners manual. Also, most Saturns will need a new thermostat with a coolant sensor code, at least that is how many I have done have worked out. You might think about having a shop really inspect the car, the AZ guys mean well, but they aren't mechanics.