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I just had one in the shop here. You may also notice that your coolant guage shows lower than it used to. This is likely a coolant temperature sensor, located on the back of the cylinder head. It is giving out of range readings of the engine temperature, and will be most noticed on startup. It is very important to remember to check the pigtail when changing the sensor because corrosion is what usually wrecks the sensor in the first place. It is too difficult to clean the pigtail so replacement is a strong recommendation. Any Saturn dealer should have it. Abe G.

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โˆ™ 2005-08-18 21:24:19
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Q: Why would a Saturn SL1 vibrate violently and the service engine soon light blink when the car is started?
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