1999 Saturn SW2 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 Saturn SW2
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1999 Saturn SW2 ProblemsA/C off for Engine Protection and Engine Reads Cold
The 1996-2001 Saturn SW2 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.
1999 Saturn SW2 QuestionsAuto trans will downshift sometimes all the way while at freeway speeds (1 answer)
Cycling on/off brings it back quickly. Feels like computer, not valve body. When this happens it brings up the check engine light and it won't shift right for days. Then every thing is fine for a while but not long. Is this my engine CP running amuck? You never know what or what starts it, bu...
I just had a new radiator and thermostat put in last week. I have had sensors replaced, new rear brake lines, alternator, battery, plus much, much more in the engine before inspection in October last year. I do know my valve cover has a small crack in it which my son will be repairing this week...
Condition happened suddenly. Have recently replaced CPS, spark plugs, valve cover gasket and water pump. Car was running fine till yesterday-now cranks but won't turn over