It refers to the Heated Oxygen Sensor, and specifically that the signal remains unchanged for more than 20 seconds after closed loop. Probably time to change it.
2001 Mazda Protege ES uses tire size 195/55 R15
where is the transmission shift solenoid located on a 2001 Mazda protege
at the library
The Protege's went through a small redesign for the 2001 model year.
A 2001 Mazda Protege uses standard 10w-30 motor oil. This provides a good balance of viscosity and protection for the engine.
With my 2001 Protege 2.0 ES I am getting between 28 and 29 mpg.
i guess there are none. seriously.
it is located on the motor in the front
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Click the link.
No , it is not an interference engine
It takes 5W-30