A truck's temperature gauge reads normal, but the engine is overheating. The most likely cause is:

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Multiple choice — select the best answer

ALow coolant level
BStuck open thermostat
CDefective water pump
DDefective temperature sending unit

✓ Correct answer: D. Defective temperature sending unit If the temperature gauge reads normal while the engine is actually overheating, the temperature sending unit is likely defective, providing incorrect information to the gauge.

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A truck's temperature gauge reads normal, but the engine is overheating. The most likely cause is:

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