2006 Mazda Mazda6 Q&A

2006 Mazda Mazda6 Question: What does the code P0126 mean? I had Auto Zone diagnose why the check engine

Light came on and the paper they gave me said P0126. Check the radiator and the overflow was empty so I filled it half way and the light went off but the next day the light came back on and the paper said either the thermostat or the sensor and I would like to know which so that I dont have to change parts I dont need to -
Answer 1
code means thermostat is posss stuck open,but if your loosing coolant have car pressure tested to determine leak at that time rep leak and repl thermostst -