2004 Saturn LW300 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2004 Saturn LW300
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2004 Saturn LW300 ProblemsA/C off for Engine Protection and Engine Reads Cold
The Saturn LW300 may display the warning message "A/C off for Engine Protection" on the instrument panel. This may be accompanied by illumination of the check engine light and the temperature gauge reading cold at all times. This is a feature of the engine that is activated by the power control module when it detects the engine warming up too slowly. The OBD trouble code P0128 may also be stored.
The cause is simply a worn out thermostat that stays open at all times, preventing the engine from reaching the proper operating temperature.
Replacement of the thermostat will correct the issue.
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
2004 Saturn LW300 QuestionsBattery light indicator on the dashboard stay on? (2 answers)
I replaced alternator and the battery still good. I don't know why the Battery light stay on.
It is all doors and the FOB and door lock button seem to activate it just slightly, so you have to press the button several times to get the door to lock or unlock. I think it must be some command module failing. I would like the part number and the difficulty in replacing it.