Perhaps the alternator is not charging the battery adequately check with a voltmeter A fully charged battery should read around 12.8 (without engine running)
With engine running reading should be 13.8-14.2
You need to repair the cause of the code that turned the light on. You can then reset the light with a scan tool or a battery disconnect.
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Likely the battery or alternator, but probably the alternator
No
It shouldn't be
constant draw on the battery? dome light on? old battery?
show 1993 ford escort ac diagram
The Escort was created on 1993-04-15.
Either you've got a dead cell in the battery or the cable ends need to be cleaned and tightened.
no you have to change air sensor
The light mentioned is an indicator that the coolant level in the radiator is low.
Yes they are interchangeable and identical.