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The coolant temperature sensor monitors engine coolant temperature and sends that reading to the ECM, which uses it to adjust fuel delivery, ignition timing, and cooling fan operation. Signs of failure include: a check engine light with a coolant temperature code, the temperature gauge reading incorrectly, the engine running rich or lean, or the cooling fans not activating at the correct temperature. Replace a faulty sensor to restore proper engine management.
Delphi Technologies is a major global automotive supplier with deep OE roots, manufacturing fuel systems, ignition components, sensors, and diesel technology. Known for advanced engineering and innovation, Delphi delivers proven reliability across multiple product categories, though quality can vary by specific product line.
