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Q: Check engine light on, no coolant reading on display. on 2008 Chevrolet Cobalt

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Wife was driving car when check engine light came on. She checked display, all working except no coolant reading was displayed. Where should we start?
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Check the coolant level. If its low, top if off with proper GM coolant.
If the coolant level is correct (radiator and overflow bottle), have a reputable shop check and diagnose the cooling system for possible sensor problems.
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